#reporting-fraud

Lost my savings to a 'new friend' from a cooking app, now my money is gone from a fake investment platform. Where do I even start reporting?

Feeling so stupid and alone right now. I met this person through a cooking recipe app, like a community thing, a few months ago. We started chatting, then moved to WhatsApp, and it felt really natural. He was so supportive and charming. Eventually, he started talking about this amazing crypto investment platform, showing me screenshots of crazy returns. I'd never done crypto before but he was so convincing, said he'd 'guide me.' Long story short, I invested about 12,000 Euros. He even showed me how to make a 'small profit' initially to build trust. Then, when I tried to withdraw a larger amount, poof, platform disappeared, and so did he. My heart aches for the money, but also for the deception. I feel utterly betrayed. I'm in Hamburg, Germany. I don't even know where to begin reporting this. Should I go to the local police? Is there some international body? Any advice appreciated, I'm just so lost.