Ok so i was following this tutorial: https://www.youtube.com/watch?v=vzojwG7OB7c And it seems like I've done everything.
Now I just tried to connect to the website (www.patrick-gruszka.com) on my LTE connection to check if it is working, but it just says server unavailable. Any ideas? Im also using google domains for my domain. Sorry if I do not have enough info, just don't know what to ask.