Great photos, good to see the 6s still getting some love

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If you're starting out in photography then you've done a great job understanding how to get the most from light (not shooting into it, taking photos at dawn or dusk etc).
I think some of the photos work in portrait but equally as the other poster said, landscape might work better for some of them.
One tip I do have is to go into settings and switch on 'grid' this overlays a grid onto the viewfinder when taking photos and makes it easier to line up straight lines etc.
Hope that helps!