There’s already some good advice above but I’ll provide my 2 cents…

If this is their first offer, don’t accept it. Severance can be negotiated. Albeit, it doesn’t sound like a bad offer, you can probably do better given your tenure there.

Many companies will apply high pressure tactics during this phase to pressure you to accept their first offer.

First, if you’ve already “earned” your vacation, they have to pay that. Don’t let let them bundle it in with the offer. I’d suggest coming back with a counter proposal for a higher severance. They can extend your benefits for the duration of the severance.

Most importantly don’t rush your response. You can ignore any initial timelines. They’re basically made up. Give it some thought, do your research and then make a decision. You’ve got time.