Ok everyone...it seems that some people couldn't figure out how to post a comment so here's a how to.
You have two options:
If you want to comment on a specific post go right down to the end of the post and click "comments". There you'll be able to leave you message.
If you want to leave some generall comment or just say hello you can do so in the sidebar on the right side. Just enter your name and you message and click "senden" to send it or "löschen" to delete.
Hope this helps! I'm looking forward to your comments!