There are two ways to start cannabis, seed or clone. usually you geminate couple seeds grow them out . once you have found your favourite one make her a mother.
Mother plants are kept in a vegetative stage as clones are repeatedly cut from her .when you take clones from your mother all the clones will be pretty much the same, they will grow the same taste the same that kind of thing. there are also many ways to cut clones everyone has there own ways whats ever works for the individual i guess, me easiest most forgiving way i do is in domes with jiffy pucks little rooting gel make sure i have perfect humidity and temparature in the dome now you need low light like a shop light with cool blue blubs and you should have root couple weeks one tip i have is really make sure your mother is kept healthy the healthier the mother the more success you will have with your cuttings, roots will come faster Heres some pictures of my mothers and clones