Hi Fal, im sure your baby already recognises your smell & voice,you have taken over the parental role & he see you as his parent
I personally wouldnt use a spray to distract him nibbling your fingers,i would just be consistent & tell him no, he will learn in time,
why would you massage an empty crop,i would had thought you would only need to massage the crop if your baby had sour crop/crop impaction or slow crop !
Babies like warm food,mashed sweet potatoes etc,just make sure when you use microwave be sure to check for hotspots in the food,offer plenty of different varieties of food now as Dennis is showing intrest