What lifespan would you recommend for realistic aging?

I want a long lifespan to let Zois have time to build skills, and relationships without rushing for anything.
I’m not sure if my current settings make sense in the long run, the thing that bothers me is how young adult lifespan is the longest, and I don’t know if it will align well with the older stages. 30 days for young adult feels a bit short for me.
What would you change or recommend?