Absolute bare minimum supplies:
Resin (Generally epoxy; making dice with UV resin is, uh, challenging.)
Colourants & inclusions for the resin (i.e. alcohol ink, resin dye, mica, glitters, ect.)
Stir sticks for mixing resin (you can start with craft sticks, but they can introduce bubbles, so if you go no pressure pot, you might want silicone stir sticks.)
Snippers or X Acto knife for trimming flashing
Zona papers for sanding & polishing
Something to ink the numbers (usually acrylic paint, but anything that's thin enough to get into numbers & durable enough to not transfer off)
Paintbrush for inking (this will depend on your preference; I recommend starting with a cheap multipack from a craft store & seeing what works best for you)
& MOST IMPORTANTLY (YOU CANNOT SKIP THESE THINGS, DO NOT SKIP THESE THINGS):
A respirator that fits your head properly & is rated for particulate & fumes to wear for casting & sanding
Nitrile gloves to wear, again, for both casting & sanding
Somewhere to work away from where people spend a lot of time, away from anywhere pets & children can get, period, & with lots of ventilation
Somewhere either outside or sealed to keep your molds in while the resin cures so you're not inhaling fumes
Keep in mind, these are the absolute bare essentials. Dice making, due to the specialized nature of many supplies, is a rather expensive hobby, but the above lists can get you started, or at very least, give you an idea if it's the hobby for you & if you want to invest more money into it.
As for getting info on starting, check out Rybonator's YouTube & join The Great Library of Dicecraft Group on Facebook. Rybonator's channel is great for intros to a lot of beginner techniques & the Facebook group is where a lot dicemakers hang out & talk shop, so there's plenty of resources to be searched for there & if you can't find an answer, people are generally really kind about answering questions. If you are being reasonable & waiting to see if you actually like the hobby before investing in specialized equipment like a pressure pot, take a look at Kaitlin Pierce's YouTube as well; she has a lot of great info on casting without a pressure pot in a way that minimizes bubbles & voids.
As much as I love dicemaking (& I really truly do), it is rather expensive as well as expansive. I often joke it's really five hobbies in a trenchcoat because, well, it kinda is. Mold making is a different skill from resin casting is a different skill from finishing dice is a different skill from inking is a different skill from 3d modeling & printing (yep, those are part of my dicemaking, & tbf are actually multiple skills in & of themselves)... Yeah, the list goes on. The skill/investment floor is kinda high, particularly if you want your dice to be rollable, but the skill/investment ceiling is just... Woof. So high. You can really just keep pouring yourself into it & continue to do cool new things & improve your skills beyond what you thought possible for years & years before hitting a real stopping point. Plus the community is always coming up with new techniques to try. I highly recommend checking out some dicemakers on Instagram as that's where a lot of people post their new work for the public to see. You can find my account at the same handle as here on Insta & check out my following list for a place to start. I follow something like 400 accounts & the overwhelming majority are clacksmiths of some variety.
But yeah. Have fun, stay safe, & good luck!
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