There may be openings in the BB course this weekend, but I wouldn't recommend a BB course until you've had a chance to purchase and fire your selected pistol at least 500-1000 rounds, and can manipulate all the controls flawlessly. The BB course is as much about safety on the line as it is about the Rules and the Course of Fire, and fumbling around an unfamiliar pistol will at best distract you from the course, and at worst cause you a safety infraction or accidental discharge. On the BB course I took, we had a gent who clearly wasn't comfortable with his gun - mag fell out, couldn't find the slide lock, fumbling with the holster, etc. After the first day, he was asked to come back again for a later course.
If you want to see how it works, on the cheap, EOHC has a practice on Range 3 (farthest in) most Sundays, from about 10:00-2:00 (probably not this weekend, because of the BB). The RA Centre also has practices on its range most Saturday evenings from about 7:00-on. If you like what you see, download and read the Handgun Rulebook (don't worry about rifle and pistol, but they're fun to get into later).
You'll need Eye and Ear protection, a pistol belt that attaches to your waist at three or more points (we use a velcro inner belt, worn normally through the belt loops, then the hard outer belt attaches all the way around), minimum four magazines and eligible mag pouches, and a permitted holster (the Rules have details). Practice "dry firing" with no live ammo around - mag changes, double-action, single action, hold-open, etc. Search on "IPSC" and "Todd Jarrett" on You Tube, to get an idea of how things work, and to pick up tips.
Once you've got your gear, and you know your pistol (controls, feel, and you can hit a 8.5x11-inch piece of paper at 15 yards consistently with slow fire), sign up and have some fun.
Don't let all the above get you down - it's not as long a road as you think. I started toying with the idea of getting my PAL or RPAL in Feb 2009, and had the BB course completed in November, only because there seems to be fewer courses during the Summer (during which time, I shot the pistol as much as I could afford).
Are you a member of any of the local Clubs or Ranges? If we're in the same neck of the woods, I'm always up for a day on the range!