Most all the sites have play money tables so you can learn the game . The play is far from "realistic" due to the wild loose play , but if you play smart you can learn a lot .
The freerolls are good to play as well . Just try and play the strong hands and avoid the donks and you just may even build you up a bankroll . I got my start a couple years ago with just a 14 cent win and the rest has been history .
If you look around you might even try one of the sites that give you free money to start with...use this money wisely and you can build up a nice bankroll and be well on your way .
Good luck , and I hope you do well .