Help! New to Garmin Fish Finder

[Mr Crosby]

Evening, all.

I'm looking for someone near Lake Livingston who can help me figure out this dadgum fish finder. I have the Garmin Echomap UHD 72sv that came with my new Seadoo Explorer Pro jetski. Yeah, I fish off of my jet ski.



I've never had a fish finder so I'm lost other than turning it on. Not sure the settings are correct - I do see stuff, but haven't a clue what the heck I'm seeing.

If any fellas out on Lake Livingston that can give me some pointers I'd be much obliged.