There are lots of ways to explain the 3 most important factors in taking better photos - it's a delicate balance between Shutter Speed, Aperture, and ISO - and it's not easy to imprint mentally - it takes time…we've got a variety of cheat sheets to illustrate it - if the exposure triangle cheat sheet grabs you CLICK HERE to get your free login details and download your copy.
Personally I don't think the triangle is the best way to illustrate Aperture, Shutter Speed and ISO, as it does not explain the relationship between the 3 settings (the law of reciprocity). I recommend reading Why I don't Like the Exposure Triangle
If you are confused - as most people are, I highly recommend looking at Photography Basics for a great value, quick and easy 'get up and running fast' course.