Update your LinkedIn profile. Get a free month premium if you don’t already have it. But don't get sucked into it everyday by setting up a routine and boundaries for yourself.
Set up a routine for yourself.
Previously when you were working, you had a routine, if your work was dictated by your calendar, set up your own personal calendar with time blocks to help with the transition.
Reach out / Talk to someone / Get support
You never know when the next opportunity may come from. Tell people you are laid off, do not be ashamed of it, you are laid off, not fired. It's not about your capabilities. Replace your negative thoughts with