I have a kind of grown out wolf cut and I want to trim it but idk how. Like I've been trimming my bangs bc I can actually see them and I've been doing it for years but the back/sides have been getting kinda long and I don't want to mess up my hair by cutting it and it looking terrible since I don't know how to do it. I have an appointment for a month and a half from now to get my hair cut professionally, should I just wait it out?