Sam Rayburn guide that can teach Lowrance HDS electronics

I just purchased Lowrance HDS 8 for the bow and a HDS 10 for the console. Does anyone know any Sam Rayburn guides that teach Lowrance electronics? I pretty much understand the navigation. It's the sonar and side/down scan that I need to learn. My main objective is to learn to identify deep water areas that may hold fish.

Lynn Atkinson with Reel um n Guide service does never went out with him so dont know how he is I know he does teach on this and uses the HDS units and Structure scan. Check Stephen Johnston as well dont know what he uses but talked to him a few times at Needmore Tackle Store really nice guy gave me quite a few just shootin the bull there in the store.

stephen johnston runs hummingbirds.