i was assuming google targets blackhat sites and since you are saying this, i might consider going grey now, thanks mate helped me understand a lot,
google's owners have no moral or conscience, they'll always chase the money at all costs if not regulated by someone bigger than them. And, currently, there's no one capable of holding google responsible, so they'll do whatever they want in order to make even more money.
Meaning, they will target your site (black hat, grey hat, white hat, or rainbow hat, it doesn't matter) if they think that your site's absence could make them more money. Of course, I'm speaking in general here, it's not like google have a personal vendetta against you or your site(s)...
They just chase after money, and if tanking your "white hat" sites makes business sense for them they will nuke you to oblivion, they have no remorse or conscience to feel sorry for a random nobody (as a matter of fact, I don't think that business people feel sorry even for their own mothers or children, but that's the conspiracy theoretician in me, so we will leave this aside for now)
Anyway, the thing is that if you build even 1 link (regardless of its type, quality, source, or way in which you build it) you are already doing black hat. Google doesn't like link builders because they mess up their algo, so they'll target them when they catch them and if it suits them to do so. But if you don't build links someone else will and they'll knock your pretty white hat site out of google, so you'd better start building links too
i would like to know if im creating backlinks should i focus on individual URL or target my homepage to good ranking ?
this topic can (and most of the time is) be subjective because everyone has different goals and different circumstances for their sites. Some people want to rank the homepage, others want to rank their blogs, while others might want to rank their category pages, or maybe their podcasts, PDFs, social profiles, etc...
So, it's kind of difficult for us to tell you where to point your backlinks without knowing your site and goals.
But, generally speaking, google is head over heels in love with authority nowadays, and authority means backlinks. The more backlinks you have, and the stronger they are, the more authority you'll have and - as a consequence of this and in combination with other factors (niche, content quality and user engagement, brand awareness and popularity, etc) - the more and higher you will rank even for keywords that you don't actively target or - in some cases - that might not even be relevant to the topic of your site.
Just look up some profitable keywords in google in 10-20 different niches and see how many ranking spots for some of those keywords are taken by big sites that have nothing in common with the intent of the keyword, but they're only ranking because of the insane authority and trust those sites have with google. I'm referring to sites like Forbes and a few others, that have sprouted up in top 3 for all sorts of keywords that have absolutely nothing with the historic topicality of these sites. It's crazy how much google rewards big sites with rankings and traffic just because they're authoritative...
The point I'm trying to make is that you might want to boost the authority of your site and, in order to do this, you will have to point at least some of the strongest links you can get directly to the homepage and to other main pages (main categories, for example... or services / portfolio pages if you have such pages and wish to rank them, etc).
And the other backlinks you can point to inner pages since - if your site is new and you're doing SEO like most newbies are recommended to do (ie. target easy / long tail keywords first) - those pages will most likely target easy keywords so they have big chances of ranking with fewer links...
Again, we don't know your situation and what type of website you have and which pages you'd like to rank in order to be able to give you specific instructions, but - as a general rule - you should point some of your strongest backlinks to the homepage (using branded and exact / partial match anchors if possible), while splitting the rest of the backlinks between the other important pages of your site (categories, services page, blog posts, etc)
Also important: try not to build links to pages that get no traffic yet. This is a mistake that a lot of newbies make and which is a recent implementation by google (I'd say in the last 5 years just to be safe, but it's probably a last 2-3 years thing, but I'm not sure when this started, but it didn't use to be like this a decade ago)...
To understand why this is important think of the nature of backlinks. In what google is concerned, backlinks are random people (complete strangers) that find your site somehow and they like it so much that they will take about it on their site. This is what google thinks a natural backlink is, and how backlinks are theoretically obtained.
So, if your pages have no traffic yet, but they're getting backlinks it's easy for google to figure out that you are the one building links to your site because if these pages have no traffic then who on Earth is linking to them? That's why linking back to pages that only get traffic makes sense.
Now, I'm not sure that google will penalize your site instantly and irrevocably if they find trafficless pages that get backlinks. But it's better to be safe than sorry, so try to get some traffic (not just any garbage traffic, but traffic that sticks and engages with your site and - equally important - that returns to your site regularly) to a few pages that you intend to rank and then start building links to those pages slowly and without spamming them. It's best to focus on a few quality links in the beginning instead of blasting the pages with 100s of profile links and web 2.0s
New sites in particular are sensitive to link blasts, so play it safe and you will eventually win the race...
If you don't know how to build links (especially the frequency and anchor texts part) this guide is a good read:
https://www.blackhatworld.com/seo/guide-how-many-links-per-day-week-or-month-should-i-build.1502403/
