I mean the result might look better with an overlocker, but you can just fold and stich the ends instead. I guess it depends on what you're after. There are maker spaces and other creative hubs where you can easily use sewing machines or overlockers.
Or you can buy one for like ~€350. It's not cheap, but also not insurmountable if you want to go down the route of making your own clothes.
Maybe it's harder at that size where you have to move your hands, but I use a 3x5 split, and my eyes never leave the screen, so printed keycaps are just pointless.
It's also the immense know-how Chinese manufacturers have accumulated at this point. For a 5-piece hobby order $25 shipped, I got feedback confirming a wrong-looking part of my design before they printed.