I am a high handicapper and got fitted by PXG this past spring. It has really helped my golf game BUT I had been taking lessons for at least a 4 months to try to change some basic swing flaws. I believe the lessons are the reason I am swing the club better and the equipment is helping with set-up, distance and accuracy.
I recommend that you take some lessons especially with a teacher who has access to shot flight data-swing path information, launch angle, dispersion, distance, etc. Initially, this will inform you of what your swing characteristics are. From there you can work on what, if anything, needs to be changed. If you need clubs buy a used set knowing that you are only going to use them for a few months. Once you have worked on the changes and feel comfortable repeating them, then I would go get fitted by someone who has access to more than PXG. Purchasing fitted clubs is expensive and you should be able to play them for ten years. So be a bit patient, be smart, gather your data and work on your swing changes, if there are any to make.