Riding a Ronix Parks board as a beginner was not the best board for you to be honest. Parks has historically produced some of the most aggressive shapes in the industry (especially his rockers). You said the Harley didn't hold up but you only ride boat, what part of it didn't hold up just out of curiousity? I ride boat and cable weekly and have ridden my 2012 LF shane hybrid for the past 8 months without breaking it or really even messing it up at all. It's scratched up like crazy but that's about it so wondering why your Harley didn't hold up. LF is a great brand, if you liked the Harley, try another board in their line. Possibly something with a grind base, the board will be slightly heavier but more durable and as a beginner, I doubt you'll even notice the difference.
While researching boards, do some research on rocker shapes as well and the differences between 3 stage, continuous, and hybrid. You may find with that education you can better find a board that suits you.