B&Q and Asda actively recruit over 50s in some areas, appreciating their reliability. Without knowing your talents you can register with an agency as a tutor or an adult education college if you are able to teach anything from sewing to Arabic. Maybe put an ad in your local paper, over 50, reliable, looking for work (you say in what area).
Schools need assistants to help in the classroom, primary or secondary. You don't need a degree for that but if you have that's fine too. If you are a good organiser, clutter clearers/home organisers make a lot of money, £30 per hour.
It is written that the steps of a righteous man are ordered by God, as you step out in faith He will not leave you or forsake you, He is a friend that sticks closer than a brother. He will not see the righteous forsaken nor their seed begging bread. I stand in agreement with you that every door of prejudice be closed and new divine doors be open for you, it is written that thou, O Lord, will bless the righteous, with favour you will encompass him as with a shield.
Without knowing how to help you specifically be encouraged and know that weeping may endure for a night but joy comes in the morning.