Father in law is currently doing a degree in astrophysics, he’s late 50’s. Spent the last 25 years in sales.
Had the opportunity to train an ex chef of 20 something years in a particular technology I am well versed in, he was doing a bachelors of CS and has gone on to begin a degree in psychology. Late 40’s, half a dozen kids.
It’s entirely up to you, follow your heart. The rest will follow.
It took me years to work out when people say drink water, they don’t mean, just take a mouthful and swallow. You actually need to slowly sip the water.