There is lots you can improve. But it's normal to have tanks to fight for threat in the first few moments. It's because one does not have Vengeance up by then.
I hate the tool you are posting your character with. It's very hard to see stuff there. Maybe you can repost your char with the armory.
- dont gem for hit or expertise as a tank. At least not at the currrent level.
- I don't seee any reforging. Not sure if it's the tool or you just did not do it. You should reforge a lot. All you can to mastery. If that's not possible, balance your parry and dodge so that parry is 1-3% higher than dodge.
I don't know how to find your spec or something else, so I cannot comment to it.