My first and last lesson is 'Buy once, Cry once'.
I had a very good mentor when I started. RIP Sven.
He told me to save, save and save some more until I could buy the equipment I would end up with...........he was right of course.
I bought a RockChucker kit, it cost me a months wages, I had that press, scales and reloading manual for a couple of decades. Then I upgraded to a Supreme, so I could load large cases, the 500NE & 505Gibbs, both use 1" dies.
The original RockChucker was used until I bought an RCBS Turret press, then I lent it permanently to a buddy of mine, he only loads for 2 cartridges and it suits him perfectly.
Since my initial purchase, I have added a few powder measures, electronic scales and specialist trimmers and other case prep tools like flash hole deburrers and primer pocket uniformers.
The basics with good equipment will serve you well to start off, then as your experience and knowledge grows, you can upgrade to more advanced tools.
I, too, have charged 50 cases that were primerless, spilled powder in the loading block and all over the bench is a PITA! Check FIRST!
Cheers.