Bob, I have been a guide for a lot of years and there is no easy answer to your question. I have had people hire me just to learn, whether it be techniques on fishing or how to read your depth finder to knowing what you are seeing on your side and down imaging. I have also had others who said that is what they wanted but in reality they only really wanted my waypoints for themselves and all their buddies. I have had them also want me in their boats and also to be able to follow me. I try not to do this too much as a lot of the time it gets to be a babysitting job and I really need to be fishing.
The hardest part would be to find someone that has the same equipment that you have. I don't have the latest and greatest as you say as I really don't feel I need a lot of it. Would it be nice, yes, necessary, not really. The best advise I can give you is to start using it and get it fine tuned to the things you do and then start expanding from there. It really takes time on the water trying different settings etc and it is hard to do in a garage. It might look fine in 10 feet of water and with no bright sunlight but you may need some completely different settings as you go deeper and are out in the weather.
The first thing I do is turn off a lot of the automatic features and work it manually especially for things like sensitivity etc. Other people may like all the automatic things.
If you are ever in Pick City, look me up and if I am available I would be glad to talk to you anytime-----and I wouldn't charge you either lol
Always glad to help if I can---there are plenty of places to fish and enough fish for everyone but it takes time to pattern a lot of them. When you think you figure them out, let me know as they will make a fool out of a person very quickly. There is a reason they call it fishing and not catching haha
Good luck and good fishing.
Also, as far as I know the boat dealers are more interested in getting your money and you out the door than to spend a lot of time with you figuring out most things. They will give you a quick run down most of the time and that is about it from my experience. Their on the water instruction is very limited. I do wish they would spend more time with people up front and there would be less problems down the road. Even better would be to let you experiment with the new equipment and then be able to come back in a few weeks with some more training and answers for you.
I am not trying to bash dealers but their bottom line is making money and you can't blame them for that either.