RE: roll & turn
Turning can be accomplished using aileron alone, or aileron and rudder. The latter is called a coordinated turn. This helps the tail to 'follow' the plane during the turn. The use of elevator maintains your altitude.
If I'm turning using aileron and rudder, I begin my turn using both surfaces. It's a practice thing to learn how much rudder gives a smooth turn. Depending on the throws, expo and other circumstances, you may use a little and you may use a lot to make a good smooth turn.
Once you begin your turn, the plane will continue in that attitude until you give it opposite control. So if you give a right stick to bank right, you'll need to give it some left to come out of that bank.
That's the way I do it anyway. Hope that helped some.