I fucking did it
Vial arrived. Used an insulin syringe, 1mL 27G 1/2 inch needle that I bought from Amazon, 45 degrees in the belly. I was agonizing about the length and the angle because I'm fairly lean and have no fat on my moid pencil thighs and worried about hitting muscle even at a shallow angle, but it went in and out and I didn't feel anything. All that fucking stress for nothing, this was even easier than popping in a bunch of pills.
I'm a proper troon now, bitches.