Making stickers for my stuff

I'm in the process of designing stickers to put on my thinkpad, my thermos, my notebooks and other shit.

I still don't know how to properly set up the offset so i can send the file to a graphic shop (i'm not sure how you say that in english? in spanish i would call that a gráfica - where i go when i need to print stuff in good paper) and have that offset be the cut line for mechanically cut stickers.

So tomorrow i'm gonna go to one i have not visited before that's close to home, and ask them about this. Also i wanna know how to set up the stickers for holographic paper, i.e. a drawing with only an element all silver and such :)

So far i've got some bug drawings, lots of Hollow Knight and Zelda drawings, some Linux related stuff like a tux cover for the Windows key, logos like Fedora, Niri, an obligatory Aphex Twin one, Daft Punk... some mushrooms, hares, pikmins and bats :) and still wanna do a lot more.