Alright, with all that searching, I understand the last thing you want is another book; what you NEED is some spiritual and mental R&R.
If I may say something, that article you posted is nothing but senseless polemics; I walked into a tiny little Carpatho-Russian Orthodox mission and received a very
warm welcome from all the parishioners. No one seemed like they had just got there from a plane from the "old country" five minutes ago; everyone was indistinguishable from people driving down the street in my area. I was not shunned for being "not one of us," and me not being Orthodox was certainly not a barrier. Just last night I was talking with our local mission's priest, and he was once a Roman Catholic priest. Not exactly the type of story that Jimmy Akin wants us to know!
The Filioque deal is really up to your personal opinion on whether or not it's a dividing issue. The Pope has clearly been shown to be endlessly-debatable, and not all the Bible studies or research into the ecclesiology in the world will be able to definitively answer the question; it's called "faith" for a reason. I don't think the schism would have lasted as long as it has and to the degree that it has if history alone could decisively settle the matter.
I was baptized Lutheran like you, and like you I was wondering about Orthodoxy during my catechumenate in the Roman Catholic church (The idea of jumping the tracks never occurred to me, though; may have been a good idea, looking back...) and so I have an idea of what you may be going through. I've wavered significantly between Catholicism and Orthodoxy, and I know what it's like to be torn between two ways of Christian life.
I would encourage you to just give yourself a few days, weeks, months, however long you need, to just relax.
Let everything you've been learning sink in, and give time for your thoughts to settle and your head to clear. After that, if you want to inquire more deeply into Orthodoxy, I would heartily recommend it, and I would extend my warmest support and welcome. Above all, pray for wisdom, guidance, and peace. I will pray for you as well, and I'm sure many other voices on this forum will be in God's ear for you.