I found this great blog post by coincidence: How I interview testers. It includes a list of topics that the writer of the blog, uses for interviewing testers.
I decided to use this as a checklist of topics I need to learn in order to learn about software testing. Each week, I will pick a topic from it and learn about it, whether by Googling, finding blop posts, books, or the best possible way: asking my mentors at CodeYourFuture.
Here is how my version of the roadmap looks now - still a lot to learn!