Severance and unemployment, do they overlap? - first time posting

My employer is paying severance in instalments and I am not sure whether to file now. Any experience at all would help. I also wonder about the job-search requirement. Who should I ask before signing?

Before signing, I asked a friend who is a lawyer to look at the agreement. It was a short conversation and worth it.

I filed on day one anyway and reported the severance honestly. The agency decided what to do about the timing.