That’s about it really.
Find a decent doctor who may help you do a health plan, ie change your diet, exercise routine, give up smoking etc if it really concerns you.
These thing can slow the progression of the disease, but there’s not really any other treatment or cure.
I was diagnosed about 2 years ago now, I’ve got a purple puffer (steroid to help maximise lung capacity) and a blue ventolin one, for fast acting relief.