I feel overwhelmed during my internship?

I'm studying International Business and am currently completing a six-month mandatory internship at a medium-sized company. This is also my first professional experience. On my very first day, without any introduction, I was presented with a project of my own: I was supposed to start a women's network within the company. When I asked what they envisioned or hoped to achieve with this, my boss said they didn't know exactly and that finding out was part of the job. In the meantime, I had already held the first kick-off meeting with a core team and held two more meetings with the women. Now I'm supposed to write the project concept and present it to the board.

To be honest, I feel a bit overwhelmed by the task. I feel like there are extremely high expectations placed on me, not only by my boss, but also by the women in the women's network, since I'm responsible for them as project manager. I feel like I don't have enough professional experience to handle this task properly. Besides, I'm now solely dedicated to the network, so I have little to no variety.

I don't really know what to do. I think a conversation with my boss would be helpful, but I don't know what it would achieve. He won't want to change anything, and I'm afraid it will only make me look negative.

What do you think? Am I just getting carried away, or is the task too challenging for "just" an intern?