Low side reads high, high side reads low

You are correct that if the low side is high and the high side is low then the compressor is most likely faulty.

Here is a guide that will help with this:

https://www.2carpros.com/articles/replace-air-conditioner-compressor

Below is a chart that will help with this and the process from the manual on how to replace the compressor. Please let us know if you have other questions. Thanks