Injections are too easy. Subcutaneous into fat is the way to go. Don't use dull needles. Use a 18g to fill quickly and easily, then switch to a 22-25g to inject. Don't go too small or it's a pain. Takes forever to inject. I don't feel anything about 1/3 of the time, and barely anything the rest of the time.
If a doc says, creams or any injection schedule longer than a week, I'd run. It only last about 3 days max in your blood. I bet the suicide rate goes up exponentially in men on a wild hormone roller coaster.
It's a long term science experiment. Give it 3-4 months and the compare numbers with how you feel. No more than 6 mo while your figuring shit out. After that, 6mo to a year for labs.
Ideally this will assist you in getting other shit in order. If I don't lift 2-3x a week it messes me up. I could barely work out before. it would wipe me out and I'd be so sore I could barely function for a week. After about a year I started seeing real strength gains, and that led me to try and get some protein in me daily. That and the Wuhan got me into vitamins and supplements. Been lifting pretty consistent for about 4 years. Raw weight, I'm probably stronger at 48, than I've ever been. I'm still fat, but my overall physique makes the wife pretty happy. Like I said it took a probably 6 months to a year to really feel and see changes from working out.
For me I get a pretty zen chill when I'm spot on. Too low, and my temper/ frustration are right there at the surface. Too high and my dick starts doing all the thinking. On that note, if you're in a relationship talk to her. We went from 1-2x a month, to a lot. Probably average 3-5x a week now.
Once you feel good, that's your number. Otherwise the numbers mean shit, other than monitoring for health. Consistiency is key, lots of shit affects levels.