Can you tell me how can I  set up to an accredited representative or a VSO to work on my behalf?
After this you'll need to mail it to your nearest VA regional office. Please speak to the service organization or representative before you send your request.
That's good to know, I'll do that. And what exactly can a VSO do for me?
Accredited representatives and VSOs can help you understand and apply for VA benefits, for example financial support monthly payments or education.