On pokerstars
The 25 cents 45 man sit n go (non turbo) has a great structure and excellent for learning. The 25 cents spin n gos are also good.You can mix in a couple $0.55 mtt.
On 888
There a ton of freerolls these days with their new App.
In an ideal world you may want to save until you have around $50 to start playing regularly as $10 leaves you very little room for error.
Cardschat has the best freerolls on the planet the fields are very small compared to other freerolls your only real challenge with them is that there are some good players on there, which turns out to be a good thing in the long run as it offers great practice.
Have you joined The poker stars School League as yet ?
If so that is where you should spend your money. If you can play good for a month top prize is $1000. Tourney Dollars
you only need to roll freerolls!) you can play SNG 0.1 $ and sometimes try SNG 0.25 $ (bankroll management)! moreover 0.25 is the closest to real tournaments)
SnG 1.5 $ (turbo) for 18 people.With such a bankroll for me a great chance to spin 10$.Of course these games are expensive, but this is the fastest way to multiply.
I think start with cheap sit & go games.There are a lot of opportunities for learning and earning money. After that you can start with cash tournament.
But don't forget that, the gambling is risky. So this is just a game. Play after that you payed out your bills and you have money for the life.