Re:Epi or test enth?
I had already ran several DS cycles before I did my first Test cycle so fair enough, you may be best advised to try Test alone first.
But be aware, it may take 6-8 weeks to kick in properly (it actually starts working immediately but you might not feel strength gains until several weeks in).
There are several ways to go about this, frontloading or kickstarting which I'm sure you've read up on.
tbh, Hdrol @ 50-75mg ed for 6 weeks is a great kickstarter for a test cycle and I would recommend this even to a first-timer.