Liquid Light is a good material to learn the craft on, as it's the least expensive--at least here in the States--mainly because it has the lowest silver content of any available liquid emulsion. Maco/Rollei's silver content is much higher, and Kentmere's (which used to be Silverprint IIRC) is the highest...and of course, its higher price reflects that. I would consider starting out with Liquid Light, and then once you've gotten yourself in the groove, graduate to the better stuff so you can crank out some really fine material.