Daryl,
Good question. A capo can sometimes make it easier to play in other keys, but no, it’s not necessary to use a capo to play in other keys.
In the other two keys (C and D) we can also use open chords (C, F, G, D, A, etc)… so it’s still pretty easy to play in these keys without a capo.
Start working through version two and if you run into any other issues let me know.
– Mike