43 still finding my way - any help appreciated

Thank you for your time, thought and, really, any consideration at all. I'm 43 and feeling the pain of a life deeply misdirected. I'd not call it a midlife crisis, rather, a midlife realization that it's all passing me by and I feel, at my later age, this may be a last window of opportunity to alter my path for the positive with some help.

Brief: I graduated from a very unremarkable university with the usual finance degree in 1995 (Texas Tech). After graduation I took two years in the Rockies working/snowboarding. In 1998 I returned home (DFW) and began working for my family's business, an interior design business, that has done very well for 35+ years.

I've worked for my family's business from the day I returned home to present. I did so initially out of their genuine need for my help and some mild degree of enjoyment in the creativity and sales-end of it. Years passed, the business did relatively well, but I never pursued my actual interest in financial services and markets.

All I have is a 20 year old degree in finance and many years of sales experience. I understand it would be miraculous at 43, with my one-job-wonder background (in an utterly, comically irrelevant field) to enter into finance at a significant level if at all. At what capacity I would work within financial services or how I'm paid is not my concern at all; my house is paid and I'm OK for food. My concern is taking my last breath 30 or 40+ years from now knowing I did nothing to try and redirect my path at mid-life in effort to pursue something I've always intended to do but haven't (yet).

My question is simply this: understanding the unlikely nature of my attempt, I'm going to try anyway, and want to ask you all what type of bottom feeding, entry level position I should pursue or will my age and background absolutely guarantee rejection. Thank you for any thought.