have been playing poker for about 2~3 months, only read how to play like pros (i know it's not the best book)..been playing at play money table though it doesn't mean anything.

help me out here... I am about to put in 50$ (free money I earned selling items on a game).
what would be the best way for me to build my bankroll..?

I heard playing super tight at loose table plainyg solid poker will ensure maximum chance for me to do so... (is that aka grinding?)

correct me if I'm wrong or help out with my definition of solid poker

1) playing top 10 hands
2) no slow plays, raising when your card hits
3) folding on draws (given correct pot odd or no?)

thanks in advance..