Recommendations in midtown/downtown

I'm sorta new to Houston, and I'm looking for things to do in the midtown/downtown area (places I can walk to from my place near midtown park). Not really interested in getting drunk, but some other fun stuff at bars would be cool too.

I know Social Beer Garden has some strip shows on the weekends, I find them cute and stuff. I just saw a place called Solarium where you can reserve a pickleball/padel court by the hour. Midtown park has zumba on Tuesdays between 6:30 and 7:30. Simply Pho and Siu Lap City are really nice restaurants. I sometimes go walking to the AMC downtown, or to Post (just takes about 45 minutes). Someone told me there's something underground downtown, haven't seen that yet, and not sure how to get to it.

That's kinda all I know. So if anyone can recommend me more stuff to keep me busy, I'm open to most things. Restaurants you like, things to watch, things to do, groups or things to join, even new things to learn, if there are music classes or something, lemme know, please.