Open yourself up to people around you. Friends. Colleagues you trust or admire. Have and make dinner with them. Be social. Be vulnerable to people who seem receptive.
Keep a good routine. Don't let it get out of whack but don't overwork yourself into isolation.
You'll be okay in time. HN is rooting for you.
I have reached out a lot to near and distant friends/colleagues and family. It has helped and at least one new deep friendship with a colleague seems to come out of it, which I am quite happy about.
Thanks for the last sentence, made me smile.
If you cam afford to, also consider taking a trip a few weeks from now. Very anecdotal but i found capping off the low point youll go through the next few weeks with something novel can help you shake off the old mindset once you are ready.
I also found a Surf & Yoga week in Portugal I might do.