Tips for Blitz


Generally, don't.
Blitz and bullet chess is very fast and difficult to think accurately even for experienced chess players. Usually, you'll be better off learning from rapid games and not feeling rushed. Some people are way more strict about this than me though. I find blitz to be helpful when used in moderation, but what you want to avoid is making a habit out of moving too quickly, feeling rushed, and neglecting things like calculation, or double checking your moves before you play them.
Playing faster is more about learning more patterns (playing experience) and learning common endgames very well, so you can confidently convert them with less time on your clock. Endgames like how to win with a single pawn are extremely foundational to chess:
https://www.youtube.com/playlist?list=PLTXwNMbhsy4vGA5qB0WfF5kL6OkaOd2IN

But if you can endure and master it a little you'd thrive on rapid games cuz you'll start thinking faster
Sounds good in theory, but this is like trying to run before you can walk. If you can't handle a chess position with more time (rapid), then you certainly can't handle that same position with less time (blitz, or worse bullet). There isn't really enough reason to "endure" speed chess a little because it's easier to learn "slow to fast" with more patterns in mind than it is to try and learn chess fast and then slow down.