I know this is very hard, and not alwyas possible... but it would be perfect (in my opinion) if it was captured slightly lower, and maybe a bit more closed up... or with a small cut, so you would have a perfect mirror effect
I know people that say that the picture should be 1/3 - 2/3 and others who prefer the perfect balance. If you ask me, I still have no idea which one I like better. Maybe perfect balance but an upside-down photo? Anyway, the first 10k photos are difficult, then I will learn
In my opinion that "rule of the thirds" is not applicable when you are trying to get a mirror effect on the picture...
Honestly, it all depends a lot... you may learn all the the composition rules, but in the end, the last rule is usually: "Break all the previous rules you learned, whenever you feel you should"
So... Do it as you like it better! If you personally are not 100% satisfied with this result, next time try to make it better... try other angles... try from different places... next to the ground or higher... just try differently in identical situations... And you'll get better and better...
Photography is supposed to be a pleasure... at least for me
It is a really enchanting place in Slovenia. It is the lake next to the city of Bled, under their highest mountain called Triglav. The legends of the mountain and the island in the center of the lake make it like living in a fairy tale.