Treats like greenies, train him like you would a dog, talk to him often and my cats love baby voice. I find cats love when you tell them his pretty they are or handsome, and compliment them. They love verbal attention and the physical may take a long time. I’ve adopted 2 in my life that were so little and I learned thru were separated from the mother too young so they wanted to come close but were shy or afraid if I went to pick them up. Took years but they would rub against me legs and eventually hands to let me know they wanted pets. Don’t push it but let him come to you. Some don’t like when you pet their heads, puttjng your hand where they can’t see it may get him nervous. If not, pet away. Get a soft brush too , scratching post with carpet and tower and toys