Transmission not shifting properly

Is there slipping or other shifting issues with the gears that do engage?

If not, we should still start with checking the fluid level and make sure it is not low or in poor condition.

Here is a guide that will help with this:

https://www.2carpros.com/articles/how-to-check-and-add-transmission-fluid

I am also attaching the info below from the manual that will have similar info.

Next, we need to check the codes even if we don't have any check engine light on. Here is a guide that will help with this as well.

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

Based on this info, we will know what direction to go but we need to start with this so that we don't jump to the incorrect conclusion and waste time and money.