Struggles on validating your idea

Hello folks! My name is Julius and I want to be an innovator. I've worked with a few startups in The Netherlands and learned that it's pretty hard to know if your idea is going to be succesful or not!
I was wondering if you would be so kind to fill in this form for me. It takes 2 min max. It's about the problems you face as an entrepreneur and things you struggle with. I'm really curious and this helps me a lot.
I hope some people are able to help me out a little! Thanks in advance. You're the best!

https://forms.gle/pVxhDXNtkHgggsQ6A

Also: Does anyone knows a way to reach my target group better? I'm struggling a lot to find people with the problem I have in mind. Anybody has tips?