hey dude your plant are lookin good, I see a little bit of yellowing on the fan leaves tho, have you got a ph meter?? what fert are you using, about the cloning its very easy to do all you need is cloning gel or rooting gel click on this link and it will explain everything you need to know about cloning
http://youtube.com/watch?v=oV5Bi9FAZTI also do some research on cannabis growing on youtube it is a valuable resource for the beginers.
Peace