Install an oopsi! your everyday modpack! (with cosmetics, keystrokes and more) server through the Control Panel (Servers → Select your server → Game servers → Add Game Server → oopsi! your everyday modpack! (with cosmetics, keystrokes and more))
It works really well. Very easy to setup. You can modify any setting in the game. The fact that anyone can join the server and how easy it is to manage is really useful. The fact that it is very cheap but works so well for its price it is amazing. So glad I found this website.