Your problem has nothing to do with ANet. If Gamestudio can't start on your Virtual Server because no mouse is found ANet isn't even loaded
You could try to run the engine in console mode. Look into the manual under video_mode (set it to 0). This was also mentioned in the manual under enet_init_server(). Also why you need to do port forwarding is described in the manual (see introduction). Just read through it. And if you are new to MP programming, also give the workshops on the ANet homepage a try.
Is there a way to create something like a list of Games (servers) from other players.. so the clients don´t need to type in the server ip everytime..?
Yes. Just open a Webserver (like Apache) on your virtual server and implement a server list database (SQL) that is accessed via HTTP (PHP). You can make use of ANet's built in htttp functions.
ANet also has a ready to use template that does the work for you. But I would advice you to do this in the last step of your game. First try to make the basics working (connecting, smooth playermovement,...). Then try to extend it with more advanced features.
