I don't know of a vid on how to change the alt, but I did it a few months ago and it was a snap. If you got tools and some mechanical ability/common sense, then you can do this.

For the other part of your post, I'd check to make sure the tires aren't dry rotted.

 

Tires and brakes are THE most important....
Good luck

 

If you didn't add fuel stabilizer before storage then I recommend adding some now to scavenge water.

I would also change the brake fluid. Wipers might also be shot due to dry rot.

 

Sounds like you already turned the car over, so too late for this advice but anytime a car has been sitting for a long period of time without the engine being turned over, I'd recommend removing the spark plugs and squirting a bit of oil into each cylinder and then turning the engine over by hand before actually starting it. Cylinders and rings can develop a layer of surface rust over time when just sitting there - normally engine use would prevent this from happening but when it just sits there, rust will eventually move in. This is especially true of whichever cylinders have valves open, as air is free to move in/out on a daily basis as air expands and contracts with changing temperatures. Air contains humidity (moisture), which encourages rust. If the car sits long enough, this layer of rust can become substantial enough to damage or break rings when the engine os first turned over…squirting oil and turning it by hand will lubricate things and gently break any rust bond between rings and cylinders. Once this is done and the engine turned over, the rings should wear away any rust that had accumulated.

Anyway, you already turned it over and things are probably fine after two years anyway, but this is good advice to folks who go to start a car that has sat for an extended period of time.