My advice is to check in with your diocesan vocations director. See if there are any local support groups. I offer a private online support group, should you be interested.
Older and special needs vocations have to discern just like any other discerner. The Holy Ghost works on attraction. Look locally first. You might be very surprised at what you find.
Older vocations are usually very set in their ways, and find adapting to a new form of life very distressing, unless they are exceptionally graced. Older vocations are being called, though, so don’t give up. Make a novena to St. Rita of Cascia. She’s not only the patron of impossible cases, but was a late vocation herself. She was miraculously admitted into the cloister as her future sisters slept.
Mrs Cloisters OP