I feel like I'm worthless because I don't bring anything to the table.
What sort of things do you bring to the table?
I told you I don't have any skills and no sense of direction.
Experiencing doubt about living up to one's potential is a very normal train of thought and is widely experienced by people. If you feel dissatisfied about your current situation, try making some changes to better yourself such as enrolling in higher education. Through increased self-confidence brought about by personal achievement, these negative thoughts about self-worth will fade away.
Nah, I'll just continue to mope as I am.
Moping around will get you nowhere. You can take baby steps if you want and that way you don't need to make any drastic changes.