I just started playing real money about a week ago (have done 4 sessions), and with play money a week before that.

My goals are:
1. Get experience, without having to pay too much for it
2. Build a bankroll
3. Have fun (of course)

I have a very modest bankroll of $75 (50 of mine, 13 from deposit bonus, 12 from winnings).

My options are:
Limit ring games .05/.10, .10/.20, .25/.50, or higher
SNG No-limit tournaments: 5 player(2.50 + .25) or 20 player (2+.2) or higher
SNG Limit tournaments: no data availiable

I am looking for suggestions on the best way for me to gain experience to become a better player.
I started with the ring games, but with 70-80% call rate, felt the only skills I was getting was how to play drawing hands.
So then I tried a 5 player NL SNG. Which I ended up winning, but not sure if short-handed play is what I should be working on.
Currently I have been doing the 20 player NL SNG.
I have not tried a Limit SNG yet.

So what is your expert advice, to meet my goals? Please include levels you feel I should be playing too, since I have been playing the lowest limits.