What is the best thing to buy in my list thing?

Computer.

Id say a dirt bike because you rarley come across the opportunity to get something like that ( or at least for me) a computer is easy enough to get you donnt even have to save upn for as long
plus you get to travel with the bike; if you have a smartphone or a home computer that can cmpensate for not having your own computer right away

1) A computer for academic purposes, so you can do better in school

2) A regular bicycle so you get more exercise, not end up overweight

Get a dirt bike