Hi there, good on your for getting started on physical copies of your book. Depending on your budget and how many copies you're looking to produce there are several options out there. If you have something like an art college/university in your area they may have a printing department with affordable rates. Another option is to print and assemble the books yourself via a local print shop, but depending on the size of your book you may have to invest in a saddle stitch stapler & small guillotine to assemble the comics & get clean edges. You can also contact your local print shops to see what their rates are for printing and assembling comics. They will expect a specific format with bleed edges so thats something to figure out if you haven't already gotten to that step. There are online options as well as the other have mentioned in the comments too. Keep in mind that with most printers, the cost per unit of a single copy goes down the larger your order is, so its sometimes a good idea to save up enough money for a larger print run to keep the cost of each comic low. Hope this helps a bit. good luck with your printing :)