Alright. We all know it. You want to play Dungeons and Dragons, but that is just a level of nerd that you dont want to reach. No offense to people who play it, since both groups will probably like a flash RPG. It is basically a quicky version of the game that started the whole genre. The benefit is that these are free and usually much simpler than the absurdly open-ended forefather.
When playing an RPG game, you need to decide exactly how you want to play it and decide whether you are really up for it. Most flash RPGs rely heavily on repetition for some of the training aspects, and this may frustrate you too much to actually finish. Some of them lack a save option too, so make sure you have about an hour or so to actually finish it up. Once you commit yourself, you just have to familiarize yourself with the characteristics of the game. You need to decide what traits you want and what actually matters. It is generally worthless to have 1 strength and 10 luck, for example. If you dont want to be a fighter than dont get strength, get intelligence or will or whatever your character needs. Getting off to a good start with a good character makes all the difference.
Now...