New to RV lifestyle, need to know if this is normal

Another thing you may want to check is build up on the AC fins. With mine I can pull the filter off and take a flashlight and look inside at the fins. They can get a lot of dust and gunk build-up in the fins which will really restrict the airlow and in turn the efficiency of the AC. If they have a lot of build up on them then it becomes a different job. You can probably do a search on "cleaning AC unit" and have some success.