Zeke,
Enlarging your cursor is pretty easy so, not to worry!
1) Open your System Preferences by clicking on the Apple (top left) and selecting "System Preferences...".
2) On the System row (fourth row down) there is an icon all of the way to the right called "Universal Access", click that.
3) In the window that opens up, click on the "Mouse & Trackpad" tab on the far right (it may just say "Mouse" since you aren't using a notebook).
4) On that page near the bottom is a slider that adjusts the size of the cursor.
I hope that I made it easy for you, good luck!