Welcome to Aces High Raptor!
The very first thing you need to do is set up your Flight Controller. Mouse is not supported but can be made work (NOT recommended in the long run though), Joystick is a system requirement, basically anny stick will do. Keyboard only is NOT possible at all.
Heres links to two PDFs (Acrobat Reader needed!) that explain how you set up your controller:
Mouse Setup Joystick Setup This is also from Net Aces: A
Quick Reference Guide - one page you can print out with all default keyboard commands. A very handy thing to have next to you at the beginning.
Then youre good to fly. In the Help File on HTC homepage youll find a section that says "Your first flight" - it hasnt been updated yet after last patch, but it still works more or less the same.
I recommend you use a Spitfire MkIX or MkVIII for your first flights (Go to HANGAR to select, choose only 50% fuel and no externals!!). Its a very forgiving plane handling wise that still has good overall performance.
Get yourself familiar with the flight model, with what the plane can do and what it cant do. A few tips:
- go to OPTIONS > PREFERENCES > Flight and uncheck the box saying "Stall Limiter" - it keeps you from using full performance of your plane like training wheels, its better to not get used to it at all
- keep your speed! this are WW2 props, no modern Jets... they need some time to build up speed and Energy after takeoff - for maneuvering, have speeds above 150 mph (at first)
- Be gentle with that stick of yours!

Hard or jerky movements will make you loose control
- listen to the stall buzz, it warns you before you loose control. If you hear the Machine Gun sound and the shaking, youre in Buffet and pushed too far - relax on your stick and nose low for speed.
Net Aces and the Training Arena are a good place to get help and answers.