Replit runs its own 100 days of code challenge. Recently Paul Graham shared the stats on how many people complete the challenge:

What if, simply by committing and showing up 100 times—around 15 mins, sometimes 45 mins, per day—you did something that 99% of people don’t do?

This type of daily challenge is a great way to build your confidence in yourself; it’s a very strong signal to show you what you’re capable of. Of course, it also shows your consistency and energy to other people who might want to work with you. 

(If 100 sounds like too much—start with 10! It’s simple and not easy.)