Personally I quite like to upload random photos, but for some reason it's hard for me to make a post describing them. My favorites are the black and white ones, I haven't taken many photos like that because I feel that my results are not as good as others I've seen in this community D:
Describing them is the easiest as you just have to tell what you feel.
Thank you. The truth is, our photos are never as good as others, but no worries as practice makes you better. So just try and practice :)