On the subject of novices, I know that some of my peers - whom I respect greatly - would rather not deal with them. Indeed, the learning curve can be steep for would-be slaves, with many potential stumbles along the way. The dynamic of Mistress and slave, which is so familiar to a seasoned femme domme player, can be quite alien to one green to all this. And unfortunately, cluelessness in this arena may easily lead to offense. What might work in a vanilla (aka conventional) interaction with a woman often just won't do for a Mistress.
Yet I have found more and more that I enjoy my encounters with newbies. Perhaps it's their freshness which is so contagious and invigorating. And the rush of being able to truly shock and surprise the novitiate, while being the first to guide them to the heights of blissful submission. Ah yes, the joys of turning someone out! It can make me rather giddy to deprave a supplicant in some deliciously wicked fashion. To see a look in their eyes of "yes, dreams can come true" or even the nonplussed look of "yikes, what have I goten myself into?!" can be a real thrill.
I do not expect novices who serve me to know everything already, though I do appreciate when one does their homework. More important to me is the proper attitude: receptivity to my ideas, attentiveness to my commands, humble acceptance of one's lack of experience relative to me. In the beginning of one's journey of servitude, intention means more to me than purity of action. Perfection is not necessary; an appropriately deferential attitude is most important!