Boos,
I’m not tech savvy either. I like you had experience with Lowrance software and navigating their pages and menus. I was able to sit down and help a friend adjust his HDS 5 gen2 with no previous HD experience. Likely you will find your new unit pretty easy to work.
That being said I would expect the same for using down scan function. It’s pretty amazing how much down scan adds to your information and interpreting more accurately what you are seeing on your 2 D fish locater. We were dragging jigs a couple of days ago and I saw a big blob on my 2D (337 lowrance) but on the Elite 5 DSI I saw tree branches. I told my partner to pull his line. He did, I didn’t just to see what would happen and yup, hung up. We started the next pass up stream from the snag.
I’ve only had the down scan a couple of weeks and I think I could go fishing with that unit alone and know as much or more as I do using the 2D. I don’t have side scan and it does look like a bit steeper learning curve. However, if you can afford to get the scan package I suggest that you do it now so you have the down scan.
Good luck,
Michael