[IvanSologub]

We create a tool for solving your problem and will gladly share our experience.

Use, at the very beginning, the advertising rooms of social networks. They provide an opportunity to know your audience before you start spending money on advertising. You will have access to information about the demographic characteristics and interests of your chosen target audience.

On Facebook, for example, search for "audience insights" in your ad account.

You can also use google trends and SEO tools (similarweb or semrash). With their help, you will be able to understand the number of the audience and their interests. Plus cost per click.

[sawirricardo]

What tool did you refer to? @IvanSologub