Alright, so based on your requirements, the priorities are high MP camera, Android, and a size that fits your tiny hands.

Samsung S8 match all that. What are your other options?
Have a quick read through to see a comparison between the s8 and pixel 2: http://time.com/5056653/iphone-x-vs-samsung-s8-google-pixel-2/

It mentions that S8 seems to have a subtly higher saturation of colors on screen and that the front camera made the tester's skin feel pale. Other sources are saying it's excellent for any pictures of any light condition (dark or bright). The battery life for S8 seems to be a bit less than Pixel 2.

Personally, if I could afford it, I would get it. Good luck!