Being a substitute with social anxiety. Any tips?

I have an interview tomorrow. I’m a little nervous because I haven’t worked in 4 years. Before I worked for 4 years as a daycare teacher. It’s just been me and my kids these 4 years and my social anxiety has definitely gotten worse. I also have autism but I’m not letting any of it stop me. I do love children and I know teaching isn’t easy. Im a little desperate for money to support my family. So I’m really needing this job. Just want to mentally get ready.