Not insta, but this Gothamist piece lists holiday markets that sound way more interesting than the ones at Union Square and Bryant Park.

https://gothamist.com/arts-entertainment/shop-local-with-distinction-at-these-nyc-alternative-holiday-markets

@nyc_forfree on Instagram lists fun (free) stuff everyday

Sometimes a simple ‘what to do in nyc today’ google turns up interesting stuff, sometimes not

Ye the Bryant park one I find very meh and overpriced, at least since last time I’ve been there 2/3 years ago

timeout.com always has things to do

r/asknyc is the sub for questions

This is exactly what I was looking for, thanks!