I need help getting over the anxiety of volunteering by myself

I don’t have friends or family where I’m at and there is a huge volunteer event that I want to go to but I’m feeling anxious about it for some reason. I volunteer a lot but usually in smaller and controlled environments. This event is HUGE with so many people of the community coming together, but I somehow feel alone and like an outsider? I’m aware volunteering is volunteering and everything is for a good cause, but I just want to know if feeling this way is common for others. Also, anyone have tips to be less anxious when meeting new people in these types of events? 😭