We recently purchased a 40' diesel pusher for our work/business. So we are learning too. My Partner is not a big vehicle driver at all. First thing I would share with you is.... RELAX! Go slow, take your time. Don't worry about slowing traffic a little bit. Use your mirrors and your back up camera. Have someone drive your coach to a large parking lot. Take a couple of hours and just get familiar with how it handles how it turns how it stops and so on. Once your comfortable, then take it on the road a little bit. Around the block of the parking lot you are practicing in for example.
As for the systems, (Fortunately for me), they all seem to be pretty intuitive. In most cases if you do something wrong the coach will tell you. And as some of the other posts stated, read your manuals. Ask questions. No shame in not knowing.
If you have the nerve to ask for help you have the capacity to learn. Safe travels.