Hiya Hilary!
Yay!!!! It's so good to just
know when it's time to make the change & stick with it.
There's a 20-something's section to chat with people our own age. There's also a WW area (under Diet Central) to talk with other members (Hey I'm a WWer, too! And I began about the same, and we're almost the same height!... and I'm also 25. Hrm, what a strange coincidence!

)
You can do this. It is not only possible it is inevitable if you continue to make small changes and keep up good habits!
Best of success!