Motivation can be hard to come by especially when there is fear. I'm not sure by your post what you are afraid of with school, and I know there can be many reasons. I had a counselor that used to kindly tell me, to "feel the fear and do it anyway;" by breaking things down into smaller tasks, a page here, a couple of problems there, with breaks in between, so it is not so monumental. I know it is easier said than done but the smaller the task, it actually does become easily done. You' be amazed how much you can have accomplished in no time. This has helped me, perhaps it will you too.