Two questions in one:

[BCS]

How do I install a mod and do I need to play this with an Xbox controller? Why won't the cursor follow my mouse correctly?

[Witt]

Check out some of Gopher's Vids on the "Gophersvids" YouTube Channel.

https://www.youtube.com/watch?v=ne2f0rva4_A&list=PL20E326325BADAE44

Here is the modding tutorial playlist. Checkout the "Skyrim Mod Sancturary" after that. There are hours of vids if you wanna take it that far.

You'll be an expert!

No, you don't need a controller to play Skyrim, but you can use one if you want, as far as I know. Though I strongly prefer a keyboard and mouse.

Elaborate on your last question a bit, I don't know what you mean.

[BCS]

I'll take a screenshot or video later to illustrate the problem. Skyrim Mod Sanctuary I'll google. Thanks!

[Froman]

Do what Witt said. Gopher is the best resource when it comes to mods. And he has the voice of a god.