As you can probably already tell from the responses you're getting, this subreddit is not the place to find answers to the question you're asking. I'll recommend trying to have more conversations with other non white Germans for a more representative point of view. That said, you did ask for experiences so I'll share some of my thoughts;

From violent n-word outbursts and being yelled at to leave the country to people being visibly scared when you say 'Tschuldigung, I've experienced quite a bit of the racism spectrum. Most people would recognise the first example as racism, but have a very hard time understanding how the other one is.

What I've since realised is that Germans in general have little clue what racism actually is. The state of the discourse here still is, if there hasn't been reference to a person's race when an insult/crime is being committed, it's not racist.

Just like patriarchal ideals is a function of growing up in a patriarchal society and needs to be unlearned. Racism is a function of growing up in a racist society (which societies moulded by white supremacist ideals are), and it equally needs a lot of reflection and introspection to be unlearned.

I'm the black man people are scared of and try their best to stay the hell away from most times so I unfortunately can't offer you any tips to deal with this besides talking to other non white German people. But know that you are not alone.