What size needles are you using now? What weight is the yarn. If the needles are to small for the yarn it could add to the falling off. It's not a good idea to knit lace when you're learning.
My suggestion is a size US 9 or 10 needle and a smooth, light solid colored yarn. Go slow.
Is there an actual yarn store you can get to? They are usually very helpful. If you go to one and they aren't try another.