I see a bunch of overly complicated, tool intensive opinions and of course all the "lead poisoning/danger" posts. Many I disagree with. I have been casting boolits since the mid to late '80s and sinkers since my teens (early '60s).
Some would have you dress in a full Haz Mat suit, with welder's cap, leather apron, elbow length gauntlets, full face shield with respirator, pull on, mid calf length boots (no laces to trap lead spills or sprues) and all casting done in a negative pressure clean room. I started casting in about '87 and even with the crude equipment in the beginning, I only had minor burns from picking up a freshly cast bullet ("Oh look, a perfect bullet, ouch!") or touching a hot mold. I have been blessed with common sense and have had no major spills, no major burns, no Tinsel Fairy visits, no garage/shop fires and no lead poisoning or lung cancer (I don't chew on a boolit when casting and I don't do deep breathing exercises with my face over the pot). I have only started using jacketed bullets since I started heavy reloading for 32 ACP and 9mm, all the thousands of bullets cast and reloaded have been my cast. I have had a blood tests for heavy metals, annually before I retired and 3 since (12 years), all within normal range for Los Angeles resident. I use a small desk fan to blow the
smoke away from my face.
I do not use a Lubersizer (I dip lube, pan lube, and "shake and bake" PCing, and size with Lee sizing dies), or an oven or water containers for tempering. My molds are 95% Lee, no need for $200.00+ molds, and I don't need hardwood "mold whackers", I have an old plastic mallet I bought around '70 for my Lee Loader. While I do use a Lee hardness tester, I very successfully cast for many years before I got one. I have a casting thermometer (also after years of successful casting) and no P.I.D. temp controller. I have purchased a lot of alloy from The Captain, a vendor/sponsor at Castboolits, good pricing.
https://castboolits.gunloads.com/forumdisplay.php?127-The-Captain.
All that to say; you don't need a lot of $$$$ tools and equipment to get started casting good shootable, accurate bullets. Your learning and experience will progress more quickly if you keep your equipment and methods simple.
Casting your own bullets is one of the most, if not
the most satisfying fun and informative addition to our reloading shooting hobbies (you learn a lot about your firearms from making bullets for them). So K.I.S.S and enjoy the process...