Coming back after long inactivity

[Spectro]

So, I finally subscribed to WoW again. I've been mostly inactive for over a year. I've actually wasted quite a bit of money trying to get back into the game during this time. I'd pay for a month and end up only playing two or three days worth of that time. I actually bought WotLK and barely played it.
I'll tell you why:

I feel overwhelmed and confused. All these new additions and features, along with my fading memory of how to actually play the game makes it very hard to jump back into. I am actually afraid of doing Utgarde (sp?) Keep because I feel like I honestly don't remember how to competently run in an instance group anymore. I am getting new gear from quests and I'm not sure what to swap.
ex. Stamina or Intellect? What was more important for PvE again?
I have NO idea what to put my talents into. I am going to ask a friend soon, and he can probably help me with that, but I want to understand the talents like I used to.
I seriously forgot there was a Stormwind Harbor. (I stopped playing shortly after it was implemented)

I feel like a new player again, and I don't like it at all. All I can think of is doing is rolling a new character and starting from the ground up again, and then I can go back to my main later. Does anyone have any suggestions? Have you experienced this before?

Sorry for my possibly incoherent rambling.