@zimmerda I'm glad you are preparing in advance! Being as strong as possible will help your recovery.
Here is a video that shows a good set of exercises to do:
https://www.heartlandorthopedics.com/about-us/patient-education/video-library/pre-operative-exercises-total-hip-replacement
In addition walking on land or in water and peddling a bicycle are helpful.

When is your surgery?