alt Hacker Newsright but the GPL explicitly allows commercial use, which isn't what the original comment was about ("use in production requires a fee"); i agree with the previous comment that such a license is hard to assess for a hobbyist, but the GPL is not such a license (hence yes it's simple enough)
Even though it's technically allowed, a lot of companies are afraid of it. Not GPL2 - that's used a lot, because tivoization lets them ignore the spirit of it. But they fear GPL3 and AGPL.
You can also just do a crayon license. "All rights reserved, noncommercial use allowed." Nobody's stopping you. If and when Debian wants to ship your package, ask them for proper legal advice about changing it, they have lawyers.