When you installed Ubuntu there should have been an option to set the partition size. Gosh, Nixie, I feel like I talked you into this. I am sorry it hasn't been a good experience for you. I can tell you that the Ubuntu community has a lot of support online, and they may those here on Imgflip who can help you. I know that in the beginning, I had that feeling of "Oh no, what did I do," but after a little time when I got the hang of it, I really like it. I wish I could do more to help.