Overall pretty good.
One thing you could improve on is composition.
Just play around with how you take your picture. Be creative. An image that's just straight just looks like a normal/"boring" candid shot. If you're taking an individual picture of someone, play around with perspective and angle.
Another thing is the location. Ask them if it's alright to pull them off to the side. Too many people walking around in the background can be distracting. And also dont be afraid to get closer.
Try to use more "open shade" when shooting outdoors.
Direct sunlight can get pretty harsh and add unwanted shadows, and it doesn't look pleasant. It also makes the model squint.
If I may ask, what camera are you shooting with?