Hey man, I'm a beginner as well. Well, for a PnS you are shooting some good pictures. But i feel some are overexposed while some are under exposed, but like you said - you're a beginner. It's a good try.
hi first off all welcome
i too am a beginner, but one thing ive learnt is when ur taking a picture that is more than just a snapshot, it should be clear what the focal point of the image is .
google the rule of thirds