To join the server, right click on steam in your taskbar and select 'Servers'.
Locate the Favorites tab and click 'Add a server'.
Enter in the ip with port as: 'techsols.homeip.net:27016'.
Click 'Find games at this address...', if the server called 'SpaceEngineersNZ' appears, click the 'Add this address to favourites'.
You can now double click the server under the favourites tab and join.