Luggage systems

[Bigjarv]

Hi there! New to the forum and to biking and after a bit of advice if anyone has a second! Keen to try and start commuting to work on the bike and been told I need to get a system going! Figure the first thing is to get a topbox for my helmet to go in and to carry all my stuff!  Anyone got any good recommendations about where I can get descent sized topbox and where I can get a rack to fit it on etc.


Any help would be massively appreciated!!