Ive only ever used A/B, I have no chemistry backround so there no problem there, start with small amounts(100gr), and you should get pretty clean results. Once you get the hang of whats going on, you can move on to more advanched methods. This all depends on what type of knowledge you have and what equipment you have at your use.

PS... stick to the intructions of the extraction method, dont get you shit mixed up, plan what your going to do, do the research and be safe.