You'll get used to the Mac if you use it every day. Make sure to learn the keyboard shortcuts. Most of them are right next to the menu items (Command-X, C, and V for cut, copy, paste) but some aren't, so you have to go to online help or Google them. They usually use the Command key instead of Control. The Control key is mostly useful inside a terminal window, where it works just like in other unix systems.

Here's some good ones to start with: Instead of Home and End, use Command-Left Arrow and Command-Right Arrow. Command-Up and Command-Down move the cursor to the top & bottom of a document. And Option-Left Arrow, Option-Right Arrow move the cursor between words.

Have fun. If you don't like Mighty Mouse then ditch it and use whatever you like.