Beginning Blog

Well hey guys I'm a bit new at this but I read many information here, on another websites, forums etc. So I'm so close to make my first blog actually I don't know if that blog will be black or white never mind now. Anyway I want to ask you some questions.
Question 1. : Do you spend a lot of time choosing "right" keywords?
Question 2: :What's better or it doesn't matter IF - I have an universal blog about everything what I just find OR better way is that I target some exact subject.
Question 3:How to best choose name of that website? (Again it maybe depends if that blog is universal or not.)

About English - I tried my best .
Thank you for future responses.

A1-Yes. You also should.
A2-Crap. Nonsense. At first, you may feel millions of people will pour into your blog. At the end of the very first month you can see maybe one or two visitors coming. As Napoleon said: NICE NICEH NICHE
A3-Find a niche (keyword for small market. 500-15000 searches per month-your domain should include the name. get a com,org,net domain)

Forget being Universal. You are not Superman are you? Concentrate on 500-15000 people who will come to your site and buy something or click on ads.

For example

Do not make a site about furniture. That is universal.

But make one covering "Blue colored bedroom furniture." That is niche.

good points

1.yes,i do.And you should too.it is one of the most important things in IM,
2.since you are just beginning,do not even think of considering a blog about A to Z topics.start with a simple niche blog that could be making you at least 200 USD each month.

Well thank you guys I appreciate this.

if you don't use spesific niche...its very hard tp promote it..and you must update it every day.. use niche and buy domain on it

80% game depend upon ur keyword research then buy domain accordingly