Car only moves when transmission is shifted into reverse

This could be a number of things like an internal transmission issue or even a pump or valve body issue.

However, the most likely cause of all of this is a shift cable issue.

So I would suggest we start with checking the cable and make sure it is not only attached but adjusted properly.

If the cable is okay then we need to check the fluid and make sure it is full and in good condition.

We may need to change the fluid so here is a guide that will help with this:

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Below is the information from the manual that will give the detail we need in order to adjust the cable or replace it if needed.

Please let us know what you find with this. Thanks