I had a look at what you probably are. That looks fine to turn Barbarian. I noticed that when you select feats, the first one the game will recommend for a Barbarian is Weapon Focus (Greataxe). You already have Weapon Focus (Longsword). Having Weapon Focus in two melee weapons is a bit of a waste, so you'll have to start selecting feats yourself. I recommend feats like Dodge, Mobility, Spring Attack (all good if you move about in combat), Improved Critical (damage goodness <img src="/ubbthreads/images/graemlins/delight.gif" alt="" /> ), Knockdown (good versus magic users), and Power Attack (good against easy to hit foes and solid objects).

And yes, you do gain ther best of both worlds. You'll have full armour and shield proficiency.

By the way, unless you are Human, Dwarf or Half-Orc, you will level more slowly when you start multi-classing this way.