Honestly, if you can take good pics with your S2, you're on our way to Pro because Pro do compromise and learn work about their cameras in different situation too.
Pro also started from being a beginner. They too take many many countless pictures with hand-shake, noisy images.... somemore, ten years ago, it was all flim. Loading the ISO 400 and shooting at ISO 100. ISO 1600 on flim is superbly noisy too. Work abouts... post processing.
Pros learn about marketing, web designing, photo cataloging, album designs, portfolio, Adobe Photoshop, Inputs & Outputs of photography, from framing to print-outs. the entire process, how to market your stuff, how to market your services, your studio...