In the end of last year I created something like what your doing here (www.hotcoffeeclub.com), also with customers in Germany and also posted it to HN just as you did (https://news.ycombinator.com/item?id=6818369), not sure if you saw it at the time.
About 8 months in I've definitely learned a bunch and I ultimately decided to stop doing it couple of months ago (the website is not run by me anymore). If you'd like to have a chat my email is on my profile.
In the end of last year I created something like what your doing here (www.hotcoffeeclub.com), also with customers in Germany and also posted it to HN just as you did (https://news.ycombinator.com/item?id=6818369), not sure if you saw it at the time.
About 8 months in I've definitely learned a bunch and I ultimately decided to stop doing it couple of months ago (the website is not run by me anymore). If you'd like to have a chat my email is on my profile.