As you said you lean more towards sub side, I suggest you to start with giving orders like strip herself first, and then to strip you. Kiss your body in the places where you specify and lick your private parts etc.. Initially it may sound like you are asking her to do things nicely.. and when you observe she can respond better in more assertive voice, asking nicely becomes ordering her and so on. Make note of every mistake she does while following your orders and spank her butts for each mistake. Be hard on her while spanking. Showing mercy is not liked by a sub even when the pain makes her cry!!