Tell me about the mistakes you made when you first started!

Hey! I’ve been down the rabbit hole for weeks reading reviews, comparing sellers and factories, and scrolling through posts late at night. 😅
I just wanted to ask for some advice from those of you who’ve been doing this for a while. Do you think it’s worth buying mid-tier reps first to see if you actually like a bag/style, or is it better to just save up and go straight for high-tier?
Also, what were your biggest mistakes with your first orders? I’d love to learn from your experiences before I make mine.
Thanks!