Agree on test only or test with an oral kickstart. I’d make sure my PCT is spot on, going to be tougher to recover your HPTA at 42, IMO.
Was for anyway...which is why I’m on TRT now.

I’d run it anywhere from 12 - 16 weeks if test enth or cyp. Longer you’re on, tougher the recovery too. Test prop or sustanon could be an option too