First, to join the server simply connect to: play.nextgamers.eu (Minecraft Java Edition)
The server is hosted on a virtual server by Server4You.de. It has 8GBs RAM, 200GB SSD and 6 vCores. So theres room upwards to give Paper more ressources to allow more players or more plugins.
We wish you a lot of fun playing on the server and if you have suggestions, feel free to use our feedback page.