You did not mention where you are in your aviation career path. If you are at zero time, it will be a hard couple of years (unless you are independently wealthy). To get private, commercial, instrument, multi and enough hours to get on with a commuter will take a year and $50K.

If you already have 2,500 hours+, significant multi engine and turbine time, you can potentially get on with a fractional right now. They have been hiring airline retirees, so 40+ is no issue at all.

I'm 47 and at the very bottom of the seniority list. No reason not to try - but know what you are getting into.