Start on the alpha or the previous release?

I'm about to start learning T2D, and I don't know whether to start with the new alpha, or use the previous release. I did a few tutorials a couple months back (before I got slammed at work), and I remember some terms were incorrect because the documentation had been updated (removing 3D terminology, I think?) but the code had not yet been updated.

So which would be better for someone just starting out with T2D, who doesn't know much TGE either?

Thanks in advance!