NEED ADVICE

So I’m a UX Designer with a few months of experience under belt, and this new startup that has just registered their company is recruiting me. Here are the plot twists: • They haven’t started making their product yet and are planning to launch all their applications in six months. • Even though my title will be a UX intern for the first six months, I’ll be the sole UX designer in the company so I’ll be the one to design all the apps. •They may hire a part-time experienced UX Designer to guide the process but it’s not decided yet. • Stipend/salary is not a problem or a subject to consider in this. While I’m getting excited because I know I’ll get lots to learn, I’m also getting jittery thinking that it’s too big of a responsibility to handle alone. Any suggestions?