If you spent three years learning and developing yourself, then where is the problem?
Everyone went through a lack of experience at the beginning. In other words, nobody has started with experience, even those who have learned through their parents’ shops, and so on. Those people did not see the start, and even if they did so, they would not lose!
You can get an experienced partnership but ask yourself, are you ready for that? Keep in mind that partnership is the worst in business.
Coming to the 600 Euro, it is enough to have a lot of businesses, but it depends on your interests.