Got severance, how does it affect benefits? - 10 months and counting

I was offered severance of 15 weeks after being let go as a web developer and I am unsure how it affects benefits. This is my first time dealing with any of this. I have a mortgage and need to plan. Did you file straight away?

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