1st ever shot! Wow.
I have taken lots and most don't come close to this.
A couple of hints for you that I realised, try spot metering, not that there is anything wrong with the exposure here, just I got good results faster and tele lens are usually softer at the long end so try 250mm and 270mm and see if you get any difference in sharpness, again nothing wrong with that either just something to try.

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