I love Bare Escentuals. At first, I thought it was a little expensive, but I use so little of the foundation that the cost is actually less than the liquid Almay I was using (2-3 bottles at $13+ vs one BE pot at $25). I love the coverage.
You can get some try-me kits with foundation, brushes and mineral veil (a translucent "setting powder".) These would be the first things to try. If you like it, then move on to face colors (blushes, radiances, all-over-face colors) and eye colors. I personally love the Buxom lip glosses. QVC has some good deals at times on color kits.
So, start with foundation, foundation brush and mineral veil. If you like it, move on. My skin looks so much better with BE makeup, but everyone is different.
Oh, and to explain, the All-over-face colors are colors that you can use as blush, eye shadows and you can even dip lip balm in for a lip color.