Yeah, been there.
Frame of mind is everything.
Try to see things differently, even if it results in dark humor. (No problem with dark humor, unless it humiliates or spreads untruths about another person). There’s plenty of great material out there, especially now — you just have to open your eyes and mind to it. Oh — and don’t try hard to be funny — that’ll be forced and will fall flat. The funniest stuff of all is unexpected and gently self-depreciating.