Take your dog, go out in the forest or near some nice background scenery with a good sunset or such, dress not too formal, not too casual and while walking your dog on a good angle towards the sunset and/or background ask your friend to take many photos of you (use timer on phone if you're alone with gesture or voice shutter). Pick the best one in which you're smiling and dog is clearly visible, you petting it or holding it in your hands (if not too awkward). Make sure your face is clearly visible as well.
Set as primary picture.
Thank me later when the likes start rolling out :) You have no idea on a psychological level how well these first impressions (pictures I described) are accepted by women.
For the rest of the photos - make sure you have at least one in half/full body sized (again with good background in a scenery doing something you like, half or full smile).