Wow, thanks for the endorsement! I'm happy to have found a way to share my love for programming with so many people, and it's even cooler when it helps someone improve their skills :)

Props for making it through rehab by the way. I also fought drug addiction, though in a different country to yours! I completely understand the drive to have a coding project as a part of recovery -- I've done the same, though my projects are much less impressive than yours :)

Can you share a few pointers on how one would go about starting with writing their own OS? I do have iOS and Android dev experience.

How does one even go about writing something from scratch which runs on a particular hardware?

Is this possible to do for mobile OS? Lets say writing an OS from scratch for mobile?

You should watch his videos. They shed quite a bit of light on SerenityOS is written, and it's given me a lot of insight on OSes work.

Seconded. Dude is super positive and a hacker in the OG sense of the word. I watched him port Diablo to serenity in like an hour. Mindblowing. Quite frankly his ability is almost intimidating.

I want to second that. Andreas YouTube channel is a great source of genuine inspiration. It's enlightening to see a person as skilled as Andrea doing such great craftsmanship regarding scoping things, improvising, making mistakes, fixing them, making compromises to achieve goals, and more.

I see Serenity OS, I upvote it :)