There're many freeroll to play for build your bankroll from nothing
EX. in Tourney > Freeroll in pokerstars
we have Hubble's NL , Hawking's FL , Daily Eighty Grand
but chance to win prize is very very low , I win it (get on prize pool position)about 1 time from 30 times

I'm agree with above comment so deposit $50 and play on micro first to build your bankroll is a better choice