who to sit with at lunch on first day of school?

I am going to a new school next year and I will be a freshman. I went to public school for 6/7 grade and am homeschooled this year. Since the high school im going to is a private school, I wont know anyone because none of my friends are going. I am really worried about sitting alone at lunch :( My lunch will only be freshman because they do lunch by grades since there isn't a ton of people at the school. Who do I sit by since I wont know anyone?