"I very badly want to get this right"
Being the first designer at an early stage startup comes with a lot of autonomy, a lot of new responsibilities, and a lot of unexpected obstacles. You don't have to go it alone. Ask for the support and community you need to get it right. You wont regret it.
* In order to keep the quality of the program high, every designer will be evaluated before being accepted. Adding yourself to the list does not necessarily guarantee your acceptance into the program.