Do you want comments on what you write? If yes, use a Post. If no, use a Page.

It depend on your strategy.

Yes, You can even make it a static front page and it will stay there permanently.

Yes

YES... I believe it is better to have a page instead of a post for home page...

Better as page

Pages are best used for menu’s also

Hi, Mgsaiz. Are you talking about your "About Me" page? I think I remember from one of the videos that it's better to have the About Me and Privacy Policy as pages instead of posts so people can't make comments on them.

It will work!

If that works for you

As far as I know that is completely up to you, but you should search for a theme that will allow it. I know there are others who have done this.