First of all: you can absolutely fail your first startup and then have success at the second, or third, or whatever one - or have success without a startup :)

First of all: you can absolutely fail your first startup and then have success at the second, or third, or whatever one - or have success without a startup :) So, whatever happens, recognize that if even if your startup fails, you're not "losing at life". Life goes on, and you'll have much more experience than before.