Just got laid off, what should I do first?, copywriter here

I lost my job as a copywriter and I am not sure what to do first. Thank you in advance. I have a box of my things and a short letter about benefits. Is there a checklist I should follow?

Ask for your final pay, unused leave and any documents in writing before you leave, if you still can.

I made a short list: benefits, bills, documents, and then my résumé. One thing each day kept me steady.