Can you please share examples of people who went from average to academically amazing in their 20s?

Like, are there any average or generally considered unsuccessful people who had great academic comebacks in their 20s?

I’ve been procrastinating a lot and haven’t been able to pick up a pen for the past few days. The fact that I’m 23, still unemployed and unable to crack exams for getting a job really eats me up from within. Please share some stories.