Depo Shot

So I can’t afford the birth control that works perfect for me (it’s $100 with no insurance) and I started taking it cause I have super heavy periods for 4 days and pretty bad acne all the time. Someone recommended the depo shot and I just wanna know if i’ll still have periods, and if it can possibly help my acne that’s the main thing i’m wanting it for but I don’t know if depo helps with acne? Pls lmk what helps or cheaper alternatives to acne problems