So can I ask you….. have you openly asked him for this dynamic? Did he agree to it? If he did, then you may want to remind him that this is a 2 way street and takes you both to make it work.
Punishment should not be the number one thing to happen in this dynamic. Punishment (especially any sort of physical punishment) should only come after the foundation has been set and you both are comfortable (he knows his strength and you trust in him as your Dom fully). I fully believe (personally) in more of a rewards system at the beginning. When you have pleased Him, he pleases you with a reward of sorts (chocolate, flowers, massage, you get to pick the movie, a “good girl”).
In this dynamic, you punishing Him (sub punishing Dom) does not work. That’s because there has to be one leader. But, as a leader, his true purpose should be to want to help lead you and help you both grow together. Punishment, if too harsh or too often will only pull you both apart. Call downtime and ask how it is that you are not pleasing him. What you can do to please him. What you can do to help remind him of his role as your leader. Ask “Sir, I am trying to please you in all aspects, but feel i am failing by your reaction. Can you tell me how I can improve? Can we take punishment out while we are learning and work together to create a dynamic in which we want each other to thrive as Dom and sub? How can I better follow and you better lead to get us there? I want us to walk together. We should both rely on the other to make this relationship work, and I want you to lean on me when you need my help”
I hope this helps!
KLB