You'll get more support on a hard, important, project than a derivative one.
Unpopular but right is what you're going for.
It's easy to move fast or be obsessed with quality, but the trick is you have to do both at a startup.
The company just needs to see you as like this maniacal execution machine.
Experience matters for some roles and not others.
I think the best thing you can do is be aware that as a first time founder you are likely to be a very bad manager.