Hello everybody,
I'm quite new to this game, been playing serious for about a month or something. I just lost my entire stack, because I went playing on higher stakes to even my losses (a very stupid thing to do, I know that). But I was doing very well there, I dominated the table, it was a short handed game just 4 players, I was up to 30 dollar and I started with 10. But then this hand came i got and went all-in, a guy called me with . I think I made a correct decision or did I not? Well he flopped a so it was over for me and I lost my entire stack

Then this, I'm having serious trouble with ring games with many people in it, even at the 0.01/0.02 NL table. Can anyone give me some tips? I do well at short handed games, even at higher limits but I just can't make profit at those 9-handed tables.

I would appreciate it if someone can help me out, thanks in advance..

Regards,
A starting poker player

Well, there is so many things that you don't know.
Just to clarify a bit:
1. There is no winning SH player who couldn't win in FR, in fact FR is much easier to play than 6max.
2. You can't possibly dominate the table having less than a buy-in (I think it was 50NL where you bought the minimum). What I think happened: better players backed off to your all-ins waiting for TP or better to stack you.

If you really want to improve you need to discover a whole universe of pot odds, bankroll managament, etc. There is a lot of information on this site, but I would still recommend to read a book or two first. Try to do a search by names: Harrington, Skalinsky. Their books are the best in my opinion.

You can play much more aggressively short handed, but you have to be careful as well. If you play hyper-aggressive then your opponents will wise up and try to trap you when they have a big hand, so aggression is good but over time you will learn when to slow down..... such as pushing AK all in preflop.

Thanks for the list, I gonna try and read them.