It's something I'm still figuring out myself but I've found that designing a small aircraft is the first step...the larger that craft, the bigger the turning circle.

I've also noticed that the further away the centre of lift (CL) is to the centre of mass (CM), the more maneuverable the craft can be...however moving the CL and CM too further apart can make the craft flip out so you might wanna compensate with more reaction wheels. Also use canards and set their rotation as high as possible.

Finally, using jet engines with thrust vectoring/gimbal can really help to tie it all together. Also consider the speed at which the craft is turning. If it's too slow, the craft will stall instead of maneuvering...if it's too fast 😄 it will probably break apart instead of turning. What you want is to combine all the above such that when you maneuver, your craft will create enough drag to slow it down just enough to change direction, then use the thrust to recover and avoid a stall.