Hi there and welcome to YT ! Pixel is a cutie ! I agree with the others that it will take some time for him to adjust and settle down.
Since he is such a little fellow try sitting down on the floor very quietly. Offer him tiny bits of white chicken meat, start by tossing them out on the floor, see if he takes it... gradully throw the chicken closer and closer to you, and see if he will come closer. The whole time, talk to him and praise him in a nice, calm , soft voice. Then as he becomes less fearful, try to see if he will take the chicken out of your hand.... If he does, pet him softly, and tell him what a wonderful, sweet pup he is...
i'd continue the training for as long as it takes.. He will eventually be all over you, and then i would try using little puppy toys to see if he will play with you... He just needs to learn that he can trust yuo and humans , that we are good and won't hurt him. I don't think he is use to being loved by people or has had the propper social skills training yet.
About the barking, YES he will bark!! LOL, it is all a matter of time!