> However, I am uncertain about how to plan the product. Can you assist me with this?

List your fav features of IMDB that you want to emulate in your project. Then, scope your project to something you can do in 3 months and do it and show off to users and get feedback. Then, after that figure out what to do next.

> What do you think about this idea?

There are common fallacies and pitfalls when someone says they want to do "like X for Y". (Like Uber for shopping etc). Learn about them and make sure your idea isn't suffering from those same issues.