I know what you mean. When you first start, the controls are a little bit difficult to master.
The Actionmapper is your best friend. When you start the game VIA the MWLL launcher, it brings up a menu with a couple of options to modify what DirectX you use and other things.
Look for Actionmapper.
(It is also possible to access Actionmapper from ingame VIA the options tab in the pause menu. Easy to find, can't miss it.)
With it, you can set different controls for every vehicle and even invert controls for a specific vehicle. (VTOL, Aerospace, Tank)
It's very helpful. Unfortunately, you do have to shut down MWLL (if accessing it from ingame) which does lead to a little bit of an annoyance, but you should only have to do it once.