I'm two weeks in (not that far), but I have noticed that my skin is a lot more oily than it used to be. I live in a dry climate for now, but when I move in a few months, I am sure it will be worse. I never really had acne trouble beyond what was normal during my teen years. I have noticed a few spots on my chest and back already though.

I don't know whether the acne I have is to do with T. Ever since my first puberty I've always had a few spots, after starting T that pretty much remained the same for about 10/11 months, then I got loads of spots and it's only just starting to settle down 

I hope I'm not intruding but I'd like to give some suggestions to help manage things (I had really oily skin before starting on E and had acne problems during puberty #1).
1.  If you're already shaving stick to shaving only in the direction of beard growth.  Going against the grain will pack stuff into the pores and make it likely that you'll get a blocked follicle -> pimple.
2.  You still need to cleanse the face properly - use an oil free moisturiser and that can reduce the amount of clogging up that occurs.  The alternative is to use a DHA containing moisturiser - that will close up the pores somewhat and reduce the number of pimples.
3.  You can manage the bugs that cause it in the first place.  Minomycin should be easily provided by a GP, if it's severe, then a dermatologist can prescribe accutane/roaccutane (but that's really nasty stuff on the liver and other part of the body).

The good news is that it will settle down eventually, but how long it takes will vary from person to person.

Thanks luna.

Thanks Luna! I will put those tips to work.