Start with a low weight to get the form down. For instance, a 25 lb plate on either side of a 45 lb bar equals only 95 lbs, which is a great place to start. Because the 25's have a relatively small radius, they don't give you the clearance you need off of the ground so lay a plate beneath each 25 to give you more height. Focus on driving up through your heels, keeping your back straight, and the bar close to your legs throughout the motion.
Here you can find an excellent beginner's weightlifting plan with 45 minute workouts and no fluff: Stronglifts 5x5.
One of the things that struck me in the Stronglifts literature is that fitness magazines need to keep coming up with things like "8 Abtastic Exercises" in order to sell copies. Kinda like personal finance mags/shows and their "6 Steps to Financial Security." That reminds me, I was at a house party and in making convo with a professional financial adviser I just met, I mentioned Austrian economics, wondering if he could help me understand the current market risks. He replied that many European economists saw the bubble blah blah blah. Incredulous, I excused myself to get a B & B refill.