[44net] Where to start

Hi all First time poster here so be gentle :-) Can anyone point me in the direction of where to start? I have an IP address allocated from the portal, a shiny Linux server, 2m rig and an old KAM TNC that can be put in to Kiss mode. What's missing is what to do and where to start. Any advise very welcome and I look forward to some contacts over data. Regards Andy G0HXT