Credentials: You have to finish a university / college degree, at least a bachelor. Spend the entire last year of the studies to also look for job leads for after graduation. Stay in uni and finish the entire degree. Try to expand your horizon as much as possible, get to know people from a broad set of backgrounds. Lift weights and run/bike/swim.
Interview prep:
Then try getting good at Case jnterviews, which are good for structuring your thoughts in an interview session. I really like Victorcheng.com .
Network:
Then you must network, you must be part if a social graph to make it.
Social skills:
Force yourself to be outgoing. If you are not already, it is a fresh skill that needs to be maintained.
Career councelling:
And you must have a narrative that does not paint you a picture as a quitter. Get a pro to redo your CV and get interview coaching.
You are not alone in struggling to get going in the market. My advice here will work if you take the long hard road. This thread also contains a lot of good advice for you.