"To find myself
Forgotten, all alone
Like a book on a shelf"
`Good simile here, you feel so alone like a book on a shelf.
"My heart wants redemption
For my past wrong and mistakes"
`Well done with this - however, I dont think that you worded your second line properly. Maybe you should say "from my past and mistakes" or if you wanted to emphasize your past was 'wrong' - perhaps, you may the wrong choices or whatever you meant by that, you could use a different word for wrong and blend it in your line somehow.
Good job with this, simply written. The want for redemption.