Can you tell me where to find information about starting a #web3 startup?

Hi there) Guys, I really need your help with one question - can you please tell me where to find information about starting a web3 startup? I need any information) For example, how to build marketing policy correctly? Or what to write about in a presentation of a startup, so investors will like it? I found nothing on the Internet - just empty phrases like "get better and more creative and everyone will like you".