My mum when we got older started joining groups like CWA and other various craft groups. She took a cooking course and also started yoga.
My mum was always a SAHM with no friends or hobbies (us kids were her life- she had 3 kids under 3) and through this she made friends and contacts and built up her confidence. It also enabled her to get a job supervising exams through knowing people.
Good luck and enjoy exploring who you are and what you'd like to do xxx