I had waaaaayyy more acne after starting T as compared to my first puberty.
For me, it was partly riding it out, partly making sure I was keeping my face clean, and changing my pillow case more frequently. My physician also did write me a prescription for an oral antibiotic specifically for acne that I used for about 4-6 months and that did help as well.
After 9-12 months on T, it really did calm down. I do still make sure I change my pillow case weekly and that seems to keep it pretty under control (minimal to nonexistent acne). I do still get a break out from time to time but it seems to be correlated to when I have hair growth. I'm 5.5 years on testosterone at this point and still get additional hair growth. Particularly on my face, upper arms, chest, and back. When I'm about to get new hair on my face, I'll break out in that area and the same for other areas of my body.
So... not a whole lot of great advice for taking care of it completely. But hopefully some combination of the above will help you sorta get it under control.
