I WANT A WIG pls i need tips

So, i want a wig

But, i don't want any wig, i want something alt and original, and no, i can't just dye my hair because i'm in my second year of college to become a teacher, and i will start my practice at schools soon (for obvious reasons they won't accept me with that kind of hair),  soooo i need helppp

it's going to be my first wig, so i don't have any experience or knowledge about it, and honestly, i could use some help with which site is good or how i could start. However, i realize that finding a wig exactly how i wanted it could be difficult and definitely expensive. So, i thought that maybe i could just buy a regular wig with my hair color so i could customize it myself. 

As i said, i don't have a fucking clue about what i'm supposed to do, so please, if you have experience or any tips you could share, i would fucking appreciate it.  😭