History is replete with examples of people who have found measurable success later in life. I might recommend starting with a review of those people and their lives and looking for any parallel that may suit you. Let me just leave one example from my culture, Rabbi Akiva, one of the most influential and revered Rabbi's of all time, that I often think of at times like these:
"When Akiva married the daughter of Ben Kalba Sabua,[a] a wealthy citizen of Jerusalem, Akiva was an uneducated shepherd employed by Ben Kalba Sabua. His wife's first name is not provided in earlier sources, but a later version of the tradition gives it as Rachel.[2][6] She stood loyally by her husband during the period of his late initiation into rabbinic studies after he was 40 years of age.[2] and in which Akiva dedicated himself to the study of Torah.
A different tradition[6] narrates that at the age of 40, Akiva attended the academy of his native town, Lod, presided over by Eliezer ben Hurcanus. Hurcanus was a neighbour of Yosef, the father of Akiva. The fact that Eliezer was his first teacher, and the only one whom Akiva later designates as "rabbi", is of importance in settling the date of Akiva's birth. These legends set the beginning of his years of study at about 75–80."
-https://en.wikipedia.org/wiki/Rabbi_Akiva