For the record, most of us here are advising against this and for good reason. If you are intent on continuing down this path, here is a little info.
Make sure you get labs done prior to pinning. (post those results before you start). You'll want to get mid-cycle blood work also. During the mid-cycle test you want to ensure your E2 is not too high, your lipids and metabolic panel are somewhat within range, and your test is correctly dosed.
Yes it is more beneficial to pin twice a week with Test E. Split it up @250mg about 3 days apart. Monday morning/Thursday night should do. (Not understanding something as simple as esters is a sign of not knowing what the hell you’re getting into)
As for the Adex, that is going to be completely dependent upon how your body reacts to the test. .25mg EOD should be a good starting point. Adjust if high E2 symptoms occur or mid- cycle blood work shows E2 to be high.
As for PCT, look here:
https://thinksteroids.com/community/threads/comprehensive-guide-to-pct.134353228/ If you still have questions after that, by all means post them but not till you have actually read and attempted to understand.
After PCT you should also get follow up blood work. Roughly about a month after your last dose of whatever SERMs you decide to go with.
Lastly, eat big, train hard, and fuck bitches. These 3 things are non-negotiable.
Oh yeah and you're an idiot for doing this at your age. Good luck.