I would recommend you have a permanent topic here in this forum that serves as your central “anchor” people can go to to find your latest updates. For the time being we have included this very topic into our Local Fairphoners address book (Fairphone communities) as you might have noticed. If eventually you want to create a new one, we can always adapt the address book. You might want to have a look at the Austrian Fairphoners’, Aachen, Hamburg, Munich, Nantes or Rhein-Ruhr topics in this forum (all easily findable in the address book) to get ideas how to build such a topic (and especially its first post).
Individual events on Events - Fairphone (or in other places you might want to advertise them) could then link to that dedicated forum topic of yours. This would allow you to keep editing and updating the relevant information yourself.