Also, I can play Minecraft Bedwars reasonably well, but in PvP it's like Omma's messing around: I'm bad at PvP: / Some time ago I started looking at real PvP pros and wondered how they did who managed to get so good?
Gamble and practice a lot. Play a lot of PvP. The experience then usually makes the most of it. Sure, a good mouse etc. Also helps but the main point is that a lot of games and practice
I'm one But only in archery. As sfmqlog correctly says, above all practice and search. But there's also strategy, tactics and ambition behind it. And especially in close combat, the main focus is on a fast internet connection and a good mouse, as well as some dirty tricks, sometimes even cheats. You can also set very few hack clients and slightly increase the range, unfortunately. That means you never know for sure whether this is really just ability.
In general, it is also important to understand Minecraft mechanics. For example, the one who swims underwater always wins.
FOV down, sensitivity down so that you can aim better.
Then there are PvP tactics like W-Tab or Blockhit and S-Tab, or strafing. Just search on Youtube.