Hey, Sulis!
You've gotten some great advice here. Glad to see you want to start racing.
Last year, I jumped into racing with little experience. I would seriously consider racing your first year as a citizen (unlicensed) racer. This would be where you would just buy a one-day license like Eden suggests. I wish I had know about racing citizen last year because I got my rear kicked by those fast Cat 4 racers!
I've also considered joining the club (WWCC) in your area, but it's a little out of the way for me. They look like a great club, I hope it works out better for you come spring. Luckily for me, a more local shop is starting up a race club soon, so hopefully I'll be out there with them.
Good luck to you & hope to see you at those races this spring!
If you can read this, take a pull.