How should I make friends in a new school when I was ignored and bullied in my old one and I'm too scared and shy?

I went to a new school this year, and I was bullied and belittled. They ignored me and treated me like crap. I literally had no real friends, and it completely ruined me. I don’t have any self-esteem or self-worth now. I feel depressed and I always cry at night, and I don’t want to tell my parents, because they don’t understand. Before that though, in my old school, I had no problem making friends. Now, I’m transferring to a new school. I’m happy but still very scared. I feel like people would be mean to me again and treat me like nothing. What do I do, and how should I make friends, when I’m too shy?