I've been writing code or reading about software nearly every day for about 20 years. I've been working full-time as a professional software engineer for 12.
Software and hardware are super interesting and fun for me, but what I really enjoy is helping other people to learn. I've put together a wiki with some articles and lots of links and resources for people who want to learn to code, learn more about particular topics or up their game: https://github.com/revmischa/learn-software-engineering/wiki
Not only do I have knowledge and experience in specific areas such as databases, web applications, security, networking, Linux, C, and plenty more, I also have real-world experience building commercial products and explaining complex technical concepts in straightforward English to non-technical people.
