Baby not meeting milestones?

Ma

What do you do when your baby isn’t meeting certain milestones. He’s 12 months and he doesn’t wave, clap, or any of that. He says mama but idk if correctly. He does sometimes turn when we call his name. I’m nervous about autism. He’s my first baby. It’s been putting me real down lately because I worry about him. He’s crawling and trying to walk so I’m not worried about that. He plays independently a lot. I’m just not sure.