No, you are not too old.
I'm 46, married, 2 kids, mortgage... I have about 8-12 months of CFI'ing left before my 121 apps go out. I was in flight training when the towers got hit, then the came the lost decade... I returned to aviation 15 years later (kids are not cheap!
) I'll likely never see WB Captain but will most likely hit NB Captain with some seniority...
You are young.