Changing life plans

Kara • Married 🇨🇦 SAHM Girl 09/09/16 -x- Boy 08/29/19 Waiting to TTC #3

I work in retail (high paying company) and I had a baby 10 months ago. I am on mat leave but I'm planning to quit in September.

We're planning two more babies.

I'm going to stay home with my kids until they go to school and then I plan to go back to school to be a RPN. I will be around 33 when I go back.

Is this choice reasonable? I feel like that's a little old to go to school.