Pretty much every online poker player starts at the low-stakes tables when they decide to move into real-money games, and the reasons are pretty obvious. A lot of players will tell you that low-stakes games aren't profitable, but that's generally because low-stakes players find themselves in on way more hands than the should be. It's possible and in fact practical to play low-stakes poker for profit if you are comfortable with a longer, slower burn at the table with less action. Think Tight Aggressive and crank it up to about 10% past your usual play.
As with any hold ‘em game, position plays a huge factor in low-stakes online poker games. Early position preflop players want to restrict their play to only the absolute best hands: AA, KK, QQ, JJ, AQ and AK. Limp in with a pocket pair of TT or lower and AJ is always more tempting than it should be. You're better off folding everything else when playing from the blinds or immediately after.