I think the experience you need is simply: sit down with the camera's thick user manual, and go through it page by page, following along with performing the settings on your camera. If there's anything you don't understand, such as "what is this setting or mode good for", that isn't explained by the manual to your satisfaction, write it down. Go through the entire manual, until you have used, set, played with every single setting that the manual covers.
Then do the whole thing again.
After that, you've had enough experience with the breadth of what the manufacturer has documented what your camera can do. And surely, having done this, it will have triggered some "a ha!" moments in you, where you will recognize how it can help the photography you are interested in.
There is no substitute for experience. But sometimes the seemingly small experiences (such as just exercising features of your camera that you never knew it had, or were too afraid to try) are enough to help you gauge your knowledge, and engage your creativity.
With that, you should be much more confident about attending the workshop, because you'll have a better understanding of what tools are available to you.