I have a good game idea and wrote a plan book. What can I do now? For example, there are startup factories or something.

First do the execution planning, then do the system or numerical value, make the decision, then take the route of producer or project manager, make your idea into a project book, find someone to invest in the project, then form a team, make your project, and then market, operate and collect money. If you do well, you can go public.

According to this route, it will take five years. I don't know you, but you can. Trust me.