I won't need that long. So, is it possible for me to file a higher level review to begin with?
Yes, you can request a higher-level review of an initial claim or supplemental claim decision. This option isn't available after a higher-level review or board appeal. It's also not available if you're one of multiple people claiming the same benefit, this is rare.
I've read some details about this on your page. If I call with a senior review, what do I have to expect?
During the call, you and/or your representative can talk about why you think the decision should be changed and identify errors.