How to create feedback for a project in development?

Question

Startups

Good day!
At the moment, we are at the initial stage of creating an Internet startup and the following problem has arisen. We are planning an infotainment site with a lot of headings, as well as the ability for users to create content on their own using our tools.
Experts, share your experience: how and where can we get feedback from users if the project is still being developed? As an option, KikStarter and analogues, but they need to see a ready-made project, some sketches and plans, and we are still at the formation stage and want to know if our development will be interesting to the user, whether he considers it relevant, and what he would like see on such a portal. Of course, we will provide comprehensive information, but we are not ready for KickStarter yet.
I will be very grateful!

Answer 1

Create something like a presentation, find the target audience in social networks, get to know each other, send a preza and ask for feedback. I have helped several marketing projects in this way.

Answer 2

Create minimal functionality with a button: "Fix it!" and there already follow the messages (and their number).