I highly recommend taking a look at /r/skincareaddiction's wiki, they have a pretty good suggested beginner routine to follow. For years I had a bit of acne that I could never seem to escape no matter how careful I was about not touching my face, but I followed a few of their tips/suggestions and it cleared right up! I can't speak to how effective their advice is when it comes to moderate/severe acne since mine was really minor, but it seems like a lot of people have found success with the advice there.https://www.reddit.com/r/SkincareAddiction/wiki/index
Aside from that, general upkeep stuff like drinking plenty of water, not touching your face, maintaining a healthy diet, is really important. I also agree with >>302
, talking to a dermatologist would be in your best interest since you said your acne is a bit on the severe side.