How custom you talkin , weve gota trimmer right here (joe) ,
as for working on cars just go for it , i been lucky there have always been cars around me , sure i could say ferrari before mummy , plus ive done an apprentiship , just do loads of readin anyhtin y can get ya hands on , magazines books , allsorts , dont have to read cover to cover like you have to learn, just have a nosey now n again youd be surprised how much ya learn