One big bet per hour was common in the "old days" (brick and mortar game) but over the internet that is on the low side now. I'd say 1 1/2 BB's an hour is about right for a pro, maybe more. If you play 10/20 and can sustain that ($30 an hour) you are legit in my book.
When I say sustain it I don't mean over the week-end or for a couple of weeks, I mean on an annual basis. Most records are kept for tax purposes on a yearly basis when it comes to reporting and claiming your winnings anyway. I would recommend keeping a journal even as you learn the game, get home and fill it out each time. Track wins, losses, how long you played, stakes, etc.... and also add your own comments along the way about anything you feel should be tracked. The more info you have the better it is.