Just Starting Out, Any Tips?

Good morning all, thank you for taking the time to read this post. My name is Shea and I am 16. I have been reading around on this subject and would like to start selling on amazon. I have between $750-$1000 that I would like to allocate as an initial investment, but am unsure of where to start. Absolutely any advice would be greatly appreciated. If anyone has a decent amount of experience and would take the time to talk about this over discord/phone call, I would have no issue reimbursing them for their time. If this is the wrong sub for this kind of question, I will take it elsewhere.

Thanks again!