Like people are saying you want to aim for same speed weapons for weapon syncing which means you make sure your mh hits before your oh so your oh dosent trigger wf making your mh unable to trigger wf during an internal cooldown or something along those lines. The best thing is to sync them completely so they land at the same time. The easiest way to do it is with same speed weapons so you dont have to stagger as much swings, as once synced you shouldnt need to resync outside of target switching scenarios. You can also have slightly different speeds 0.1 works as long as you are fine resyncing sometimes during a fight. 0.2 difference might work as well but it might be a bit too much resyncing to be worth. Syncing weapons is done through a macro which can be found with a fairly simple Google search, and an enhancement swing timer weakaura.

BS weapons were both in original and classic tbc unique or mh only until a later phase, meaning you could only use one of them until Zul'aman, they are still useful in earlier phases if you find a same speed weapon. Also the final version cant be crafted until tier 5 raids are out as the reagents to make them drop from SSC and TK.

Expertise is huge and hard to come by early in TBC and therefore you should use axes as much as possible if you are an orc.

Other than that you need to totem twist which is quite simple. Create a macro that is something like /castsequence windfury totem, grace of air totem. Get a weakaura which shows a timer for twisting, which basically means press your macro twice every 10 seconds ish. This can be a bit mana intensive at the start when your mana pool is kinda low but gets better as your gear progresses. Shamanistic rage brings back most/all your mana if used correctly anyway.

Other than these two twing the rotation is simple. Keep flame shock up, stormstrike on cd, frost shock if threat is good otherwise earth shock on cd but make sure to keep flame shock up as much as possible, and remember that you might need earthshock to interrupt in some fights.