Hi guys just after some Osterine advice

First of all I am 18 years old , 180 lbs at about 5'8 and have been training for 3 years , my bf is about 8 or 9%

I am interested in possibly trying sarms or serms and was wondering..
What should I cycle in what doses and for how long?
What to do for pct if needed?
What should I expect on the cycle and after?

Thanks for the help