Other than the fact Linux has a cool name, could someone explain why I should use Linux over BSD?
No. That's it. The cool name, that is. We worked very hard on creating a name that would appeal to the majority of people, and it certainly paid off: thousands of people are using linux just to be able to say "OS/2? Hah. I've got Linux. What a cool name". 386BSD made the mistake of putting a lot of numbers and weird abbreviations into the name, and is scaring away a lot
Nobody should start to undertake a large project. You start with a small trivial project, and you should never expect it to get large. If you do, you'll just overdesign and generally think it is more important than it likely is at that stage. Or worse, you might be scared away by the sheer size of the work you envision. So start small, and think about the details. Don't think about some big picture and fancy design. If it doesn't solve some fairly immediate need, it's almost certainly over-designed. And don't expect people to jump in and help you. That's not how these things work. You need to get something half-way useful first, and then others will say "hey, that almost works for me", and they'll get involved in the project.