Balding at 22 at the crown, want to start finasteride but worried about side effects

[Medicfuh99]

Hi everyone, So as you can tell from the title I am 22 and I have noticed my crown balding and thinning over the past few months. I want to start fin to help control this and maybe salvage my hair but got worried about the sexual side effects, not being able to have kids and also a person on reddit talked about since I am only 22 it can affect my puberty and hormones and brain function. Does anyone have any advice? And for christ sake do not just say shave it off, Thanks!