In our humble opinion, Time Out Tokyo is one of the best, if not the best source of online info on things to do in Tokyo. Definitely check them out.
https://www.timeout.com/tokyo/things-to-do/88-things-to-do-in-tokyo-12th-edition-guide-map-out-now
Also check out some of their other great recent articles:
Where to see iconic Japanese scenery without leaving Greater Tokyo
7 best things to do in spring in Tokyo
Roppongi Art Night has gone online
Travelling under Covid-19: Getting from Narita and Haneda airports into Tokyo