Sorry to hear about all that but welcome back.
What should you do?
Well that depends on your goals, your available time and what you enjoy doing.
3 days a week TBT is a pretty solid idea for getting back into the swing of things.
Go for jogs, ride your bike or play some pick up basketball a couple times a week on the side.
You’ll be good to go.
There are tons of threads about different routines so a quick search should leave you with a lot of good reading.