Female led relationships discussion

This past June, my Mistress put a collar on me and claimed me as hers. The tag marks me off as her property; I promised to obey and serve Her, accepting that my purpose is to serve and please Her.

By August, the chastity cage had arrived. She has been gradually acclimating me to it, and now I have worn it for a month straight. She gave me a few days of freedom before locking me back in for another month. She announced plans to tattoo me as her slave and pierce my body. She also ordered that all my earnings go into Her account while she holds the reins on every decision. Obedience is mandatory.

She set up four-point restraints downstairs and spends a few hours each evening doing T&D with me, making me repeat vows of obedience to Her will. When I struggle to make myself clear in promising to serve her, she sometimes gags or whips me.

She usually takes release several times during the night from me.

This exceeds everything I ever dreamed of wanting. How can I ensure I am serving Her properly and meeting all Her needs? Do Mistresses prefer slaves who misbehave occasionally to test them, or do they desire flawless submission to Their will?