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.
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
5 places in Japan that look like scenes from Spirited Away