Mine is the same way. I think it is just their way of interacting with the world since things are so new to them.
I wouldn’t worry about it just yet mama. In my experience, it would be some time before he’s able to be diagnosed anyway.
My 18 month old never sat still. All kids show signs of adhd or autism because they are so young, ready to explore the world, and don't stop. You can look for signs later, I think age 4 or 5. For now, just enjoy him and don't worry. If you still worry, you can check with his doctor.