tips for getting the scruffy unshaven look?

[ceresvulcan]

so I don't have a lot of facial hair, but I do get a pretty good mustache and some under/around my chin. I don't like it too long, I'd rather keep the scruffy look, but all I've got is a normal razor. I know I need some sort of trimmer, but idk what to get, and considering I don't have much to work with, I feel like an electric razor is a bit silly. At the moment I'm using scissors.