Until you’re on the verge of dying it’s never too late.

People go (back) to university later, either to get an extra degree/qualification to advance their career or to finally find the job/qualification they want. Depending on your location, and CV you may not have to do some course, and be allowed to retake a year/test as often as you want (Because university understand that a 40 something adult, sometimes with kids, can only follow 1-2 class per semester).

At lest it’s work giving a couple of call to your university, they most likely have a person dedicated to adult student which can guide you through the process. Note also that depending on your country/status you may be eligible to some government help (usually through unemployment agencies)