Well, all of this is good advice. But please remember that a D/s relationship is first and foremost a relationship. You only know each other as well as the amount of time you have spent together will allow. You said that this is a new relationship for you, or a new phase of your relationship, and I see no reason that you should open up completely at this point. Please go at a natural, organic pace for a new relationship and don't let the power imbalance mislead you. Revealing yourself is meant to be a process, not a core dump.