I was handed the WFR back a few weeks ago when it all started. Hit the ground running, depending on your location, apply for unemployment, update resume, update LinkedIn profile, start searching on Indeed and LinkedIn for jobs, and set a goal of applying for 3-5 jobs a day for the first week or two. Get yourself in a routine, don't sleep in, start exercising, and getting out of the house for walks sometimes. I'm already interviewing for jobs, but know the hiring process for many jobs that pay well can be 30+ days so the sooner you start the better off you will be.
Now I would say some of the people above are being super nice. I didn't train my replacement as I was only told on Thursday that my last day was Friday. But I didn't go out of my way to do anything for anyone to help because how did they help me? Just like you I'm sure you worked long hours and took on more then your job role required to help out the team. But in the end where did that get me with this company, no where. All I did was pretty much cancelled all my meetings, immediately started updating my resume, and reached out to a select few to tell them Friday is my last day and logged offed off. I didn't so a single thing for DXC once I got notice and really why should I?
The only reason I still worked there was because it was easy then having to do a job search and interviews and all that fun stuff which would require a good amount time and effort. I wasn't happy, but not unhappy enough to leave. But this doesn't mean I didn't work hard, because I did and a lot of us did. But its funny when I look at who they kept it was a good amount of people who made much less then me and didn't really care at all about anything. Status quo is what these people did well. This layoff was all about $$$ and making the books look right for the C levels to get there bonuses.
Look at this as the motivation to find something better. I'm already interviewing for jobs way better then last role and with better companies. DXC or CSC or HP looks great on a resume and so many recruiters pull those first because if you can hack it there in that sh*t hole then you must be a good employee.
Keep your chin up..