Figuring out life..?

So im 25 and just graduated college, i feel like im completely clueless and useless in my field, i know nothing, i feel scared and i can't really see a future ahead of me. I started searching for a part time job and also decided to focus a little bit on one of my hobbies but honestly i feel like im lost, idk what to do, where to go, if my existence is worth something, if people are proud of me, i trully don't know anything at all (and it saddens me a lot), so any advice in how to face this stage of life ??