How many players will 2GB of ram get me?

Question Above ^^^^ I got 2GB of ram and an 8core cpu

Well... You will know when you get enough players. But you have 0 players online right now. I doubt you can get to that point in a short time.

imagine an auth plugin that makes connection with mysql db's or cURL frequently thats been triggered when player joins a server plus plugins that handles things incorrectly and stuff...

Do not execute cURL connections in the main thread. cURL connections are much slower than MySQL.

i dont use cURL because im not using APIs anyways yet. i run mysqli queries asynchronously and it really improved a lot!

Lol infinite mini games is an old server not mine....mine is MiniPrisonPE

Hm alright... And how many plugins are you using?

If you use many plugins, the server may start to slow down, plus the quantity of players, your Internet speed and clients' Internet speed... Plus some other weird things... You may think that

It doesn't depend on how many plugins. It depends on which plugins.