Oh my gosh, thank you so much. I'm on version 1.16.5, modpack is just a bunch of mods I've downloaded myself.
I was playing fine this morning, game froze and I restarted it, that happens a lot. Loaded it back up and it loads every world but this one, this world gets stuck at this (not my photo, but what it does):
If you need any more information, or files, please please let me know, I've been stressing over this all day. Thank you so so much. Here's the link.