New to this ...

[Deven6741]

Hi, could someone please help me out?
Yesterday evening was my first time racing RC (borrowed a friends spare car). I really enjoyed it and would like to take up the hobby and get my own car etc. trouble is, I have no idea where to start with what car, transmitter tools etc etc
The club that I have gone to races GT 12's ... Hope that's the correct terminology.
Ideally, maybe a second hand set up would suffice? Any help with this would be very much appreciated

TIA