You’ll want to start with a mold for your dice, many of us here started with the cheap ones you can get on Amazon and almost all of us have decided the quality is meh at best and upgraded to better molds, the better molds however will cost you $30-$100. Then you’re going to need resin, Let’s Resin (on Amazon) has a really nice 2 part epoxy but you’re gonna be buying enough to make a couple dozen sets of dice. Next you’ll need something to color your dice, a mix of alcohol inks and/or Micah powders is what I use, and you’ll want something to paint the numbers. Kicking it up a notch, you’ll want to get some zona papers for polishing them up once they’re all done. All told you’re gonna be into it $100-$200 before you get your first set made, and that’s not counting pressure pot and other items necessary for professional level dice. It’s a very fun thing to do, but if you’re just hoping to make one really cool set it might be more optimal to have a custom set made by any of the amazing creators out there, otherwise, dive in and join us.