In my experience, you will never "tell" a DM how amazing you are. Because frankly, many divers, especially newer ones often think they are much better in the water than they actually are. On top of that, divers who actually are experienced, likely don't want to be paired with a novice.
And, also not wanting to sound like a humblebrag, "packing 50 dives into 9 months" isn't all that impressive. I typically hit 150 - 160 dives annually, and of those, all of them but perhaps 25 are done in the Great Lakes, or one of our coasts. And I've been doing that for 45 years. Well, except for the two years I worked as a DM when I was logging 300 - 400 dives a year. Or the two summers I worked doing uw construction in filthy harbours. We just counted hours then, not dives.
It's nice that you're confident, and obviously some people are more naturally gifted in the water than others. If I may offer some advice, dive according to the DMs "rules" for a day or two and let them see that you are capable, but at the same time, recognize that (a) you are still an absolute novice diver and perhaps (b) you just don't know what you don't know and (c) until you've had the excrement hit the oscillator a couple of times, you don't truly know how you're going to respond in a stressful situation.
Cheers!