I had a very encouraging and helpful response from the UNC Philosophy Department to my inquiry about teaching a Reading Group [not for credit] on the First Critique so I am going to do that this fall. It will be a series [perhaps twelve or more] of two hour lectures on the work, taking students through the entire text. The lectures will be recorded and put up on YouTube as I proceed. It has been more than twenty years since I taught the Critique, and I am looking forward to the challenge. If my Brown experience is any indication, the classroom format should work nicely. Whether anyone will actually watch even one of them, let alone all of them, I leave to the ages. Monsieur de Sainte-Colombe would not be concerned about such things.
Wallyver, the only good English translation, which is the gold standard, is by Norman Kemp Smith, readily available. With that I strongly recommend my commentary, Kant's Theory of Mental Activity. I just checked Amazon.com, and there are copies available, plus a Kindle edition [who knew?]
Don't read the Prolegomena first. It is actually misleading, for reasons I will perhaps explain in my lectures. But it wouldn't hurt to review Descartes' Meditations on First Philosophy and Book I Parts i and iii of Hume's Treatise of Human Nature.