i'm very new at this and i'm wondering about buy ins and bankroll management. a500lbgorilla recommends 15-30 buyins for NL. i plan on playing nl full ring cash for now.
i play on titan poker now, and the minimum buy in for .01/.02 to .10/.20 tables is $1 for all of them. the next level is .25/.50 and that jumps to $5. so my question is are there rules or suggestions for minimum buyins? should i be buying into a .10/.20 table for more than a .01/.02 table. it seems to make sense that it shouldn't be the same. i want to start a project to get to the next level, but without knowing this info, i don't know what my next level is in terms of bankroll.

thanks