I do handload, and I wouldn't bother with 9mm or 45 ACP. Too cheap to buy. 357 Magnum hunting/SD ammo is worth it to handload if you make enough. OTOH, if you do begin handloading uncommon calibers, such as 10mm, you can shoot for much much less than buying. Additionally, you could expand to making 9 or 45 with the expense of a die set and appropriate primers when society goes sideways. I started to load back in 2015. I am NEVER out of ammo. I don't worry about "shortages" and have the type of ammo I want, when I want, at whatever amount I feel I need.
I recommend you buy/borrow a loading manual and READ it. If you want to start, I suggest a Lee Turret press kit, for about $200; other tools you'll need will add about another $200 or so. Dies to make ammo start at $45 a set. You will want a caliper, a digital one from HF will work just fine for about $20. A box of 1K copper plated bullets is around $125. A pound of powder is under $30, and 1K primers are about $39.99.
The most important thing is this. If one doesn't like rules, doesn't like details, doesn't like repetition, and thinks that maximum loads are suggestions instead of absolute limits; then one will not be happy or healthy doing handloading.