I want to increase the range of my vocals because whenever I try to make my voice "big" or keep a note when trying to make my voice loud, it doesn't get loud or big. It just goes to a soft, high pitched kind of sound.
Singing lessons will help, but teaching yourself is a cheaper option. Doing exercises like growing louder and then softer on a note don't cost anything but time to do and you don't need a professional to help you do it. If you get vocal lessons you will be told to do exercises at home anyway.