i have been here less than a month and have a 66.86 average. I made it to master tier and plan on making it to the top. But with that said i truly believe that you have to atleast upgrade certain clubs, you can keep the starter irons, but i feel like the driver and 3 wood are a must, and i really like the wedges myself. Some may disagree but the 6 dollars on the driver will be the best money spent if you want to improve.
Good luck on the course and as Boo Weeekly says Hit it low and straight