You don't need to be in many projects. You just need a few good project and you're good. How to select those few... There are many ways to achieve that. As many of my friends explained here that you have to look for what it want to achieve. Is it something valuable or just to take your money away. Most important is the team behind it. Do they have history of something good then you can research it more and look for other factors.
Besides these the narrative atm matters a lot. Because if it favors the project it can go wild but if not then even the project is good it might not do well. So You gotta consider a lot while doing research. So when you will be on the way of doing things, the best you can learn is that time. Keep hustling.