Great advice by deadstring, djs.
Look, you want exercise with A, A7, E, Em, G, D, Am
The standard 1-4-5 in A uses A, D, and E. So you can play in A.
The Key of D uses normally D, G, and A. So, you are good in the root key of D.
The two minor chords you know just happen to be the 5ths of those two keys. (Good deal)
Since you know E and A, then throw in B, the 5th of the E scale, and you have another, the E.
The transpose feature is a great thing. But I'll say, use it, yes, but also, learn the
principles of music theory upon which this tool is based. It leads you to learning
what a scale is, how it is structured, and how the notes of a scale can be referred
to numerically: that is, the C note is the one of the C scale, the D is the second "degree"
of that scale, and the E is the third, and so on. You will learn how sharps and flats
come into the picture. Then, you will be able to transpose on your own, and also
structure your learning to take full advantage of new chords that fit into your
work, as it almost looks like you have already done.