I failed my main exam because I didn’t study properly
There is nothing to do about it
A friend told me to focus on coding, so I am going to give it a try
You’ve got this. Just keep at it. Rome wasn’t built in a day 
I wish I could study at a university, but to be honest it’s way too high skilled for me. It’s so much easier to just learn practical stuff and watch tutorials on YouTube for free. I like to stay engaged with programming, there’s no need to become a “professional”. It’s just something I’m permanently interested in.
Universities don’t teach much coding, it’s more theory. I read a book called Computer Science Distilled, which summarises computer science theory. That’s all I need to know for now 
Universities teach plenty of coding and theory. The theory helps make you able to approach a wider range of problems.