I say ride it and practice and also condition, condition, condition for new people.
However, that's about getting out to ride. Intakes, ride plates, etc are 4 bolts and are cheap. I have changed mine out at the lake plenty of times. Same thing with rear sponsons. Just read reviews on various products. If you are on a budget and not sure what you want, buy used. Often you can sell it for what you paid for it minus shipping and fees for almost no loss.
That does not excuse condition. Don't buy worn out junk with broken bolts. Buy clean used or new, even if it comes at a premium. Use anti-seize, and if the bolt isn't budging, just pass on that part until the season is over.
No one can tell you what is best for you. Here is a brief list of no-hassle changes you can make without affecting your ride time...
Intake
ride plate
grips
bars
rear sponsons
weights (to counter the battery or etc so the ski sits level)
Bilges
lifter wedges
throttle
Also to some extent props (if you have the pre-08 aluminum turd), steering system, quick steer, etc.
I'm not by any means saying you need these things. I think you should practice. But that is a list of items that you can slap on in a few minutes and keep riding that can be purchased relatively cheap. The hang up with the internet, at least for me when I was new, was tuning pipes, taking it apart for sponsons and other hull mods, etc. Foot holds are great but winter is a better time for that job.
Although you are local to FL, so winter doesn't really end out ride time. I suggest doing the big work immediately after Daytona. Not only is that the best down time, but maybe in Daytona you get to test ride and find some good deals on used parts w/o shipping costs.