I'd recommend to start any new hobbie you were delaying because of lack of time
Now you have no excuse and gotta try it

Start a new hobby will be okay, but he needs to have a passion for something, so he can start that as soon as possible and don't delay it. Many people right now have a new hobby. I saw that many people now move to youtube and create many videos about their life and share the video on Youtube. He can do that too because I see that it can be a way to make money.