Need suggestions about WordPress and plugins & SEO

Hello. I'm planinng to create a new website with wordpress. (I'm newbie) I'm testing it on a free hosting service. I've installed wordpress and I've got some questions.

First of all, I've seen a login page for me to log on and manage the site etc. But That will cause security problems i think, wont it? I mean everybody will have know the exact login page and they may hack admin account. How Can I fix that problem?

I'll get domain name exact my target keyword. It made up by three words for example a, b and c lets say my domain name will be "abc".

abc gets:
8.000 global search
4.000 us search
CPC 0.70$

but ab gets:
90.000 global search
40.000 us search
CPC 1.33$

Has "Abc" got good stats? Should i go for it?

Last question is my keyword is about health. How can i write unique content? I'm not a scientist, I can't make researchs for my "abc"

Please, lighten me about these questions. Especially last one. Also need plugin names for Wordpress & seo etc.

Thank you for reading.

No replies?

First off, you need to watch a wordpress tutorial of some sort, just search youtube.

For the searches, whats more important is the competition. Find that out with one of the free tools on here, maybe traffic travis?

For quality writing on medical topics, you'll just have to pay for it.

You don' t need to come up with new facts for it to be unique. You can combine a few other sources to combine them in a way that hasn't been done before.

So if one article says drinking water is good for your skin and another article says drinking water is good for memory, write your article on how water is good for your skin AND memory.

Try to stick to "common knowledge" information though. If it is something that is too unique, it might be an idea that someone feels belongs to them and will object to you using it.

Also, it sounds like the longer keyword phrase is fine as long as it isn't already taken for a domain name.