How do you make a movie without actors?

Claymation
Stopmotion
A puppet show?
One of those LEGO animations?

If you're willing to practice, you could do a silent animated film (much like the oldest disney shorts)

why would you want to do that. is your brain in a penalty box?

Secretly film people.

You can make a documentary where none of the people are actors

Well, you need actors to make a film, no matter what kind, otherwise, there would be no story and the fact that you suck at animation makes the situation harder. My suggestion, make a film about ghosts. You don't need any actors and still make some action happen by moving the props.

film without an actor of course does not mean anything. actors that make up the content of a film. maybe you can ask for your friends to help you. Success

You can try doing it all yourself then animating what you did on a computer or something. But that'll be really hard...

impossible

Learn to spell, this would be a great advantage as no one will take you seriously if you can not even put a centaencea together, see what I mean.