No amount of exceptions and quirks will prevent you from learning any language as long as you have lots and lots of exposure. After your reach a certain base level you just keep improving as you use the language, and even the exceptions start to feel natural.

English is the only language other than my mother tongue I have achieved this level with. I’d like to think at least in writing it’s indistinguishable from a native speaker. Theoretically tho German should be easier for me as I’m Dutch. But my German never reached the same level because of the difference in exposure