I wrote up a huge guide on the process until my phone crashed and I lost it all. but honestly? Don’t do it. It’s not worth it. Pay whatever it costs to get it professionally printed. I promise you, it’s not as easy as you think, you’ll spend more money getting the tools and materials to create a good final product than you would have done just getting it professionally printed. I can pretty much guarantee that unless you have professional design-grade printing, cutting and gluing equipment that you will not be able to do this as easily as you’re imagining it would be. Please heed my warning, do not make the same mistakes I did.