I never installed any dictionaries and it worked fine for me. IIRC.
I installed HeliBoard_1.2-release.apk . I didn’t really know how HeliBoard_1.2-debug.apk and HeliBoard_1.2-nouserlib.apk were different.
They don't really matter to most people.
And, it seems like I can do the equivalent of Shift + key on a standalone keyboard (for example, to get 1 instead of Q), but I don’t know how to, or what that’s even called.
Usually you glide from the ?123 icon towards the top, or long-press the number row.
Gliding from Shift to something else will allow you to capitalize.