Not the person you're replying to but probably because persona twitter is filled with spoilers.

Anyways I could give a ton of tips so feel free to PM me if you want more or have questions but generally I'd say don't worry about being a completionist and trying to finish every social link. Just explore the game and have fun, talk to people, do the activities you want to do.

The one thing I will be more specific about: (Marking this a spoiler in case you don't want to know when the dungeons take place, I wouldn't really consider it a spoiler but if you want to go in as blind as possible you might not want to read it) Try to finish the December dungeon on the 22nd, finishing earlier will cause a timeskip and you'll miss days to work on social links, finish it later and you'll miss a fun event