Herbie's right on all accounts.

As for what type of shoot to clone, this is awfully later to be cloning but in general, you pick a vigorous shoot with several nodes, that has not grown 'bark' yet (=softwood cutting). In flower, you would only want to take LOW branches for clones to avoid screwing with the hormone distribution in the flowering plant and possibly stressing it, plus most yield comes off the higher colas.