Hey again msp3101,
Out of the games you mentioned, NL 6-max is probably your best bet. Fixed Limit is often considered a dying format nowadays, even though it does still have a small, dedicated following. But I don't believe that you will find much traffic beyond the lowest limits available outside of Pokerstars, and even there it should be quite low.
There is probably even less interest for Pot Limit Hold'em online, and while 9-max cash games were usually considered a good place to start for beginners, they also seem to be fading into obscurity these days.
Our
Overview of No Limit Hold'em lessons should be a good place to get started. There is also a popular series on 6-max cash games by our coach w34z3l, the forum thread can be found
here, and the videos
here.
If you want to give SNGs or other tournaments a shot, keep in mind that tournament poker requires a slightly different strategy, and not everything that works in a cash game will necessarily also work in a tourney. But we have plenty of material on that as well, just let me know when you want to give it a try. This is actually my personal format of choice at the moment.
I see you already started your blog, and you even signed up for our bankroll challenge, which is great. So I guess I'll just see you over there, I'll be following for sure!