Sorry if this is posted in the wrong place, wasn't quite sure

So tomorrow I'm planning on going into town, just clothes shopping mostly BUT I've arranged to get a haircut while I'm out.
Every other time I've been to get a haircut it's been with either my mum or dad and they always used female pronouns and made sure to say ''Please can you make sure it's a bit feminine, don't want HER to look like a boy'' and from this I've never had the right sort of thing. But this time my mum has just given me the money and I'm off to hairdressers by myself (kind of dumb, but a big deal for me).
It'd only feel right to get a male haircut, so for that to happen I'm planning on introducing myself as Matthew

This is gonna be really scary, as I'm pre everything and I'm not sure how often I pass, so I hope it'll go well. I want to go full time soon though, so presenting male in public is gonna happen sooner or later.
I'll be doing all I can to pass, male clothes, voice (ish) and mannerisms, but I'm so scared I'll mess up.
Any advice would be SUPER appreciated, I'll update sometime tomorrow on how it went
-Matt