I have this exact situation, but with Russian. Both my parents are Russian, I was born and am living in Germany LOL

So I kinda see myself as a German Russian (not Russian German mind you :p)

My parents (mostly my father) did sent me to Russian Saturday school from ages 6 to ~14 (?) after which I had the privilige of a Russian literature tutor together with my sibling for a few years (yes we did cover Pushkin, Pushkin, Pushkin and Pushkin.). Great teacher, I didn’t appreciate the opportunity enough back then.

I feel like I’m lacking quite a bit vocabulary, but think I have the basis that once I do convince my brain that reading Cyrillic is fun, even if it takes me a bit longer, I will be able to slowly work myself up to the classics of like Dostoyevsky, Tolstoy political theory and the whole wealth of Soviet literature…

It often makes me quite a bit sad to be conscious of how underdeveloped my Russian is :/

Also school friend of mine grew up trilingually (Russian German mother from Kazakhstan, Canadian father; obviously grew up and lives in Germany) BTW LOL.
We spoke exactly the same languages (German, Russian ans English) and RLY enjoyed mixing them during our breaks.
And yes, we did spent a lot of lunch breaks playing Durak XD.