The main reason you work with other people is to achieve something greater than what you can do by yourself. If you can't achieve something greater than working with others then you should work alone.
When you are looking for people to work with you need to find people that can make the product better and not worse. This seems like common sense but just because you are working with other people doesn't mean that you will produce something better. Some people think that just by working with other people that will instantly make your product better. But for a number of different reasons it working with other people can be completely destructive.
You need to practice working with others. You need to find out what what works and what doesn't work. Find that right person who will help your projects shine will take time. So start working with other people as soon as possible.
You work alone to practice your skills. You work with others to synergise your skills.