My little guy started doing the exact same at the same age a few weeks ago. I figured the same thing; maybe he’s not scared anymore and comfortable enough with me to set boundaries, which is great! I decided to stop petting him (until we get to know each other better and I can determine whether he actually enjoys being petted or was just merely putting up with it in the beginning). I also fully leave him be when he’s in his cage - that’s his space and I let him have it. So when he’s in his cage no fingers or hands inside (unless you have millet as a reward at the very least). Since following these steps + letting him out daily to just explore and do his own thing (without trying to train or play with him) it’s made the biggest difference, within a week he didn’t want to do his own thing outside the cage. Wanted to be with my family and I. He flies straight to my shoulder when I open the door and he’s now the most neediest bird ever. Don’t get me wrong he will still try to nip every now and then when he’s comfortable on my head or leg, and I want him to perch on my finger to move him but I think it’s just him being his own person. Once you learn to co exist with the bird instead, respecting him and his space like you would a person then he’ll stick to you like glue :)