1. Get a New CFI who understands your flying history and learning style and that teaches to you specifically. Fire your current one. If you are having trouble VFR, he isn't teaching you very well. The first lesson should have been after you went through the Sporty's G1000 course or the King Schools G1000 course. Saying that no one has ever needed a course is very closed minded. Lesson 2 should have been an hour or 2 on the ground with the plane plugged in, or even with a giant G1000 poster that all flight schools have on the wall going over everything. He should also spend an hour or two on Foreflight with you teaching you that since it sounds like you need time with that as well. Tell your new CFI that you need more ground time.
2. Before you waste anymore gas, find a power unit and plug the airplane in on the ground, build some flight plans, push some buttons, and twist some knobs, all while sitting on the smooth concrete in the peace and quiet confines of the flight school ramp (or heated hangar depending on what part of the country you are in).
3. Don't do any flying into IMC unless you are very comfortable VFR with all the G1000 VFR basics.
4. Do not, whatever you do, fly off the steam gauge backups. If you are going to do that, go find a steam gauge airplane and rent that instead. There is no sense in spending tons of extra money for a G1000 and then flying based on the backups. It will always end up being a crutch.
5. Finally, go at your pace. If it takes you another 5 hours to feel comfortable, don't fly it by yourself until you feel comfortable. We are all different and learn at different speeds.