You litterly have to knock on the doors,as others already mentioned. For most people just the thought of doing so makes them want to quit. Also, it needs to be

You litterly have to knock on the doors,as others already mentioned. For most people just the thought of doing so makes them want to quit. Also, it needs to be an iterative process: knock on the door,learn some mistakes, improve,do more knocking. Eventually, you start getting better at it, start seeing where it's better to walk away immediately, because of all the red flags,etc. This is the stuff very few are willing to do. The rest will try Upwork/Fiverr/insert_new-_platform_name.