For simplicity I've been using Bullseye powder for all my pistol calibers for 10 something years. It's not the best "beginner" powder to use, but it's what I started on, because it uses very little powder and is easy to double charge without over filling the case. The fact that it uses less powder makes it more economical as well though. .380, 9mm, 38spl, 357, 45acp, 44 spl, 44 mag, and .40 are what I've been using it for. It's not good for a hot magnum load but it'll get you to the watered down factory mag loads easily.
Unfortunately like you're finding out now is not a good time to get into anything gun related as everything seems to be out of stock or if in stock priced astronomically. Reloading manuals as suggested a few times above, get a couple. Never had a problem with using cast projectiles that were done by someone else. My own cast projectiles work great, other than my 9mm which I need to trouble shoot still (tumble/key hole). I haven't bought components in years so I couldn't begin to tell you where to go nowadays. If you've got Glocks with the Glock proprietary rifling then you'll want plated projectiles, hard cast may work. If you're using an aftermarket barrel then you're good to go.
There might be local classes, check with local gun stores or reloading supply stores. I've never heard of them but they've got to be there somewhere. Nothing else you can search youtube or the gun alternative to youtube that I can't think of right now since youtube might actually not allow reloading videos. I'd also invest in a chronograph, while it won't tell you if you're over pressuring, you'll be able to see if you're within projectile FPS specs while working up loads. They're also good if you want to get into competitions where you really try to game them by getting right down to that power level floor.
You'll have to list what's in the kit for us to tell you what you're missing though.