I want to buy a ps4 but I am still living with my parents.
What makes you want to buy that?
I don't know if I want to leave my parents' place for good and I have extra money staying here right now.
You need to start saving to move out. You can use that money to help pay a down payment on a place to stay.
I don't think I'm ready, I'm scared to be a grown up
You can't stay there forever. You need to give them their space and let them have some time alone as well. It's important to grow up and start doing things for yourself.