There are a lot of people on here telling you it's not going to happen, but I'm going to assume you have a fundable idea and a track record in the domain needed to deliver your idea.
Submit your deck to angel syndicates. If it's good, they'll invite you to a pitch event. You can find plenty of advice online about what you need to cover in your deck.
A decent angel syndicate could easily do 50K-75K EUR and be able to follow on up to 1M EUR or so.