You may find this thread of interest: https://www.companyofmen.org/threads/help-dealing-with-long-term-career-change.154771/
Take a breath. I know it seems scary, but you will get through this.
I am in an industry known for rapid change (which I define as 'firing everyone in sight the moment there are signs of an economic downturn'). This has been part of my life for a long time and I have planned for it to happen. No doubt it will be a shock WHEN it happens.
Make sure you have an up to date LinkedIn profile. But your most likely opportunities will come from those that you know and that know you. Reach out to people you know in the industry or business world. Let them know you are looking for an opportunity to make a change. Change can be hard, but it can also be a positive thing.