Yikes Bree123, that's a LOT of quilting for a beginner. I think this could be done simply and look great with just straight lines with a walking foot. I'd do the center with SITD, and not on every round, maybe every other.... Then a large single crosshatch in the border. You can mark it beforehand with tailor's chalk which will rub out easily enough when you are done quilting.
No need to send this out to a longarmer... you can do a nice job with your DSM. It's so beautiful, you don't want too much quilting stealing the show from those pineapples.