No idea about skins, but if you want to completely remove instructor, go to your documents -> my games -> war thunder -> saves -> profile.config.blk
Open that with notepad, or preferrably notepad++.
Hit ctrl+F and search for 'enableInstructor'.
You will find
Change the first 3 to no.Code:enableInstructorGroundAvoidance:b=yes enableInstructorGearControl:b=yes enableInstructorEngineControl:b=yes enableInstructorSimpleJoy:b=yes
I'm not sure what SimpleJoy does, so I just kept it to yes.
Now you can land on airfields at high speeds!