Transmission not shifting gears properly?

We need to start with checking for codes. Here is a guide that will help with this:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Also, this is clearly an issue with the transmission so here is a guide that will get us started:

https://www.2carpros.com/articles/automatic-transmission-problems

This could be an issue with one of two things. First it could be an issue with the valve body not allowing the transmission to shift.

However, I suspect this is an issue with the fluid level or condition. The fact that you let off the accelerator to get it to shift points to the fluid first. It could be a sensor issue but I have seen this a number of times and the fluid is low and requires changing. So let's start with that and then retest the operation.

here is a guide that will help with this:

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

Let's run through this material and go from there. Thanks