If you take your Fatshark goggles and plug them into the HDMI out port on your phone they are about as plug and play as you will find. Unfortunately cell phones don't have a standard HDMI port. I don't know about Apple phones but modern Android phones have a slimport (the charger port) which has an HDMI out signal. You need a slimport to HDMI adapter which you can pick up on Amazon for about $30.
Then you just plug the Fatshark into your phone. You don't get any extra resolution but at least you get a nice head's up display with no glare.
If you tried to get the Fatshark working with RF transmitter modules you are going to find a lot of trouble. Fatsharks aren't designed to work with the transmitter inside the Vision 2+. Wrong frequency, wrong encoding, wrong camera, etc.