Help my new snake hissed

[Chabug]

Hello about a month ago I got my first ball python. I let him be for a week then handled him like I'm supposed to and he was doing fine. I fed him for the first time but when I tried to do it the second time he wouldn't eat it, the next week I fed him and he ate but when I tried to pick him up a couple days after he hissed at me. I thought he might be Hungry so I fed him again and he ate. I left him to digest and today I tried to pick him up again and he hissed at me. He is still new and still not compleatly comfortable and a little scared of me still. I'm not really sure what is wrong and I don't want him to hate me.
Maybe I'm just over reacting and should just let him be for a while but I want to keep handling him so he gets used to it.
Help?