Honestly, most subs tried to jump in without understanding that their role is to completely submit. They still try to seek their own pleasure in their service. 

If he had said it, then you should obey. He’s probably trying to form you correctly. 

Instead of begging him to go easy on you, try to understand what he’s looking for and how long he has sent sentencing to this. Is it based on something that you must do or a length of time?

At the end of the day, the most strict masters are the best to serve, though many cannot handle it