Welcome to the forum.
I think you are quite right not to deposit again while you're still inexperienced.
That is how I started out as well. Freerolls and no deposit bonuses.
Private freerolls are really a good value. Often, the prizepool is just as large as a regular freeroll but the fields are much smaller.
You should check out the link for the NDNPT and then find out how to earn chips. After you've posted for a while and gain a few rep points, you can earn chips fast and play in freerolls across a few different sites.
This will let you build up a bankroll on even more sites.
Also, if you're in to football (american football that is) check out the link for the LL (loser's league).