Try this simple method, I use it all the time and my strain (Bubba O Kush) roots in 10 to 12 days average.
Get a 2 litre coke bottle or similar and cut the top off then wash thoroughly, Pour a layer of perlite about 2" deep in the bottom then add a little water and let it settle. Take your cuttings, small cuts root much faster, make a clean angle cut, dip into gel like clonex and push into a jiffy plug or root cube etc, whatever you use. Stand the cuts on the perlite then mist over lightly and seal with clingfilm. Leave them in a warm place and forget them for 5 days. Lift the film, and mist lightly again if they look as though they need it. After 10 days you will be able to gradually peel back the plastic, if they show any sign of wilting, recover them for another couple of days then they shopuld be good to go. You dont want the cubes/plugs sitting on the water, just sitting on the perlite which is slightly moist.
Simple but works 100% for me. if you're new to cloning why not give it a try? Thing is not to mess a round with them too much, leave them sealed up to raise humidity for at least 5 days before you start to open them up/mist etc. Succesful cloning is very rewarding, and ultimately very simple, key is to get a feel for the signs.
Good luck, hope this helps in some way!