For what it’s worth, commenting on the pope is not restricted to Catholics (insofar as an A&N thread is concerned, the Catholic thread here on Deep Thoughts should be. I imagine he got banned moreso for spamming or fedposting).
Good recs. Insofar as an intro to Orthodoxy, for those of an American Protestant background I always recommend Fr. Trenham’s
stuff. The “best” intro to any subject would have to be personalized to an individual (in terms of things like background, intellect, etc.), but the aforementioned are certainly a good place to start.