Using your words to communicate your needs is never wrong. You did nothing wrong, as far as I can tell.
Maybe your Master was under some sort of stress that you were unaware of, but it sounds like they overreacted. In their place, I would apologise for chastising you like that.

Definitely it's a reward. If I'm going down on a woman and she squirts in my mouth, she can count on a lot more oral activity.

At least you're talking, that's good
You said you have a lack of desire for sex. In general? Or just the kind of sex you've been having? People's desires can change, or even go away over time, that's completely normal, and no matter how much you talk about it, there may not be a resolution.
The Read more… most important thing for you to remember is that however or whatever you feel, it's okay for you to feel that.

Even in vanilla relationships it's normal to feel guilt for a while after you've made a mistake, even if you've been forgiven. It means that you regret your actions, and you've learned from your mistake.
That's what I think, at least. I imagine your Sir is proud of you.

Great minds blah blah blah lol

That's really going to depend on her. You'll have to pay attention to her body and her reactions while you're working her up and letting her cool down. As for when to finish, denial is tiring. Let her cum before she's too worn out to make it across the finish line.
Most importantly, manage Read more… expectations. If she knows you're new at this she shouldn't expect professional results the first few times.
Practice makes perfect. 😈

No kink shaming!

Pfft. Normal is boring. As long as you're open and honest with each other about what feels good and what doesn't, you'll be fine.

That was just beautiful.