Is adulthood constant worrying of bills and deadlines?

Only if you’re unproductive

Pretty much AND what to make for dinner

It only becomes worrisome if you over spend. When you live within your income based budget, paying bills just becomes a hassle but there are bill paying apps that take out a lot of the hassle.

Then, life can go back to being whatever you make of it with what you have to work with ...

Nah, it's about protecting that inner good in you that people call immature or childish while learning to be someone others depend on

Yep and feeling like your all alone and the only one that has,the problem when everyone else is going round enjoying life.

not as much since I retired fairly comfortably

Yes. Unfortunately $ is what gives you peace of mind.

Survival is also a big part of that.

That can be a part of it.