Take a look at this website, it lists out the national VSOs who can do your VA claim for you:
https://nvf.org/veteran-service-officers/
I would HIGHLY recommend you go through a VSO for your VA claim. A good VSO will do everything for you through a limited power of attorney, and it will all be free. Like when shopping for anything, make sure you do your research on a specific agent at a VSO, some are better than others.
If you realize you found a crappy agent, you can definitely dump them and find another. You are not married to them, but I believe you can only have one VSO represent you at a time. There may be some hoops to jump through if you decide to go with a different organization or officer after starting the process with someone, but definitely do it if you think you need to. Not all offices/agents are created equal, please try to find reviews on specific offices/agents, regardless of what VSO you go with.4
there are paid services out there that will charge you a certain amount of money based on what disability percentage you get, but paying for that is totally unnecessary and I don’t recommend it when there are literally dozens of agents at VSOs who will do the same thing for free.
I know many people who have used DAV with great success, but again, do research on the specific agent(s) in your area.
Edit: not sure where you’re located, but here’s a list of all of the DAV offices at military bases:
https://www.dav.org/veterans/tso-locations-2/
Edit edit: it’s Reddit, but this link has some good info and further links on VSOs, what they are and what they do:
https://www.reddit.com/r/Veterans/co..._who_are_they/