(In the PDF, the scales talked about here are on pages 5 through 8.)
Traditional minor scales generally use the same fingerings as major scales, and I cover this elsewhere. But there are five keys where fingering is a problem, so I specifically show these. These scales starts on a black key in its normal major form. Switching to minor requires some kind of change of fingering, and that becomes extremely tricky.
The minors switch to the fingering of other groups. An additional reading problem is that several of them also change key signatures.
Db major changes to C# minor.
Gb major changes to F# minor.
Ab major changes to G# minor.
Eb major sometimes simply move to Eb minor, but also may change to D# minor. The reason is a bit complicated for this discussion, but it is a 50/50 choice.
Bb major stays in Bb when it goes to minor, so Bb major is not a key signature problem.
Gb major/F# minor is a minor nightmare. Gb major is thumbs together. But F# simple minor is an oppose scale, like C. F# harmonic minor and F# natural minor are like Eb major, with no fingers every coming together with the same finger in both hands.