Severance agreement arrived, need a second opinion - 2 months and counting

I was offered 18 weeks of severance after 18 years as a copywriter, and I have a few days to sign. This is my first time dealing with any of this. It includes health coverage for a couple of months. What did you ask for?

Thanks for writing this out. I went through something close to it 2 months ago, and it got easier once I kept a simple log of every call and form.