Do one well, and follow it through to a level of completion that you are happy with. Afterward, decide if you want to iterate and if not move to the next. As

Do one well, and follow it through to a level of completion that you are happy with. Afterward, decide if you want to iterate and if not move to the next. As for your work, contract, and other ideas you need to prioritize. If you need to build up a social circle that you trust to have a co-founder, then begin actively looking. Hackathons, former classmates, people at work. In the meantime, maybe some of your ideas will be taken by others. But there's little point in worrying about that.