1st place to start is here -
www.spadtothebone.com
I would recommend the Friday Night Special (FNS), its an excellent first combat plane. Its a rudder only, no aileron plane that is extremely quick building and cheap. These the 2 most important qualities when your first getting into combat. combat can get pretty disorienting and the hi-dihedral of the FNS makes it very stable. Your first combat planes, build them quick and dont worry about making everything look "just right", these aren't pattern or aerobatic planes, there combat planes so don't spend alot of time making them look pretty, slap them together and go fly!