How to fulfill my dream of becoming an experienced sailor?

If you are very comfortable with those boats, then you might want to consider buying your first boat. You might want to look around to see if there are any other sailing clubs nearby that offer lessons on boats that are a little bit bigger so you can get some experience. If you are committed 100% to sailing, then you could consider buying your own boat, like I said before. To sail offshore, I would find some navigating cles, weather cles, etc. to help you when you are out there. Then I would look around for a decent boat that is seaworthy.