Does anyone have tips on tiering?

I'm considering maybe trying to tier for the next EN event (meaning the Do it Ourselves one) or at the very lease I think it would be fun to try it at least ONCE in my life just for the experience but i have no knowledge on what goes into doing that even semi-successfully or if it'd even be something I personally would be capable of achieving at this point. I'm def not aiming for super high but still if anyone has tips or experience with it they'd be kind enough to teach me about I'd really appreciate it!

Edit: God already I just want to say thank you so much those who have given me tips so far. I've been taking notes and its been EXTREMELY helpful already. Though of course if anyone still has more to add feel free to continue to contribute <33

I owe you all my life skdfjlsd