On some years CC's (Not sure on yours
!), you can manually adjust the ride height, then pull the HWH fuse and it will remain in that location.
Find a level spot, and manually adjust the front to say about one fist size space between the top of the tire, and top curve of the cutout. Then find the HWH fuse and pull it, and if your's is like many of that era - it will hold that height for you.
And yes to the rough ride. Our front leveling arm pulled loose, and we raised to fully inflated front air bags. Felt like were on a wooden wagon with solid axles!!!
And great safety tip on whenever your under a coach, to consider 'What would happen if the coach settled?.' Wood blocks under the wheels as a minimum
Take your time, learn your coach. One benefit of buying, hopefully at a good price point, a coach that needs attention. Is that you will know exactly what has been done to it, when you get it sorted out...
Enjoy, and welcome,