A swamp cooler is the about the least expensive and easy to make way to drop your fermentation temp. A plastic tub, some empty plastic soda bottles, a fan and an ole t-shirt or towel is about all you need. It is technically an evaporative cooler I think. Google or search here for lots of info.
The next step is a fridge or freezer with a temp controller.
Good luck! I always thought a Stout was a great first brew attempt. The dark grain can sometimes hide small off flavors. If you brew an Oatmeal Stout that's not a kit, quick oats from the grocery should work fine.