Well its best to know the basics first and that will involve reading textbooks. If you want to ditch books for the most part, I’d suggest you try out Mohammed Noor’s video lectures on evolution: the clips are relatively short and quite easy to follow. In addition you need to know a bit of biochemistry, especially that involving proteins and nucleic acids, two types of biomolecules commonly used in evolutionary biology research.
If you can’t get those books, you can try out blogs like Sandwalk. You can learn about nucleic acids, mutations, proteins, etcetera, buzzwords in many evolution discourses on that blog.
I haven’t read any book authored by Ken Miller, but from reviews I think its a good one and worth reading.