Smokey, I'm not sure if you are real new or not. I don't want to assume. For what its worth, you need to learn how to use the trim keys for elevator, rudder and ailerons, i.e., i/k, j/l and m/>, respectively.
Then you need to learn how to use the "auto level", "auto speed" and "auto angle". In learning to use "auto level", remember it can only do so much. For example, if you set "auto level", which is the "x" key, and find that you are losing altitude in spite of it, you will need to put in a little "up" trim so that the auto trim will be able to hold you steady. Once you make that adjustment (if necessary) the auto level will keep you level unless another force acts on your plane.
You can use "Combat trim" if you want. I don't.
If you are skidding, just remember the old pilot's shortcut"
"Step on the ball" If the ball is left of center, input left rudder. If the ball is right of center, give it right rudder to center it.
Usually in AH fighter aircraft ailerons alone will turn you nicely . You don't have to worry about keeping your turns coordinated that much except maybe in climbing turns, where you want to make sure it is a "coordinated" turn by keeping the ball centered.
This will help you squeeze every last drop of efficiency out of your climbing turn. This can mean life or death if you are in 109 for example, trying to sucker an enemy in the climb in an attempt to stall him out so you can drop on him and kill him with your superior climbing aircraft. If you are way out of trim in your climbing turn, the enemy might get too close and pepper you!
Gluck!