You have to do the gym instructor level 2 course which can be done fast track 2 weeks, then you can do the personal trainer course level 3, you can’t do PT without level 2, CYQ is good £680 at most places, premier charge £1000 for the level 2, level 3 can be done on a one night course for 32 weeks(3 terms). It’ll also help that you’ve probably done A&P. Hope that helps.