That’s the neat part, you don’t!

Don’t have kids haha.

I don’t. I have to prioritize them.

Which I avoid doing.

So basically, I do none of them.

I don’t.
I don’t have kids, I work 40hrs a week, I don’t buy little things I want because there’s a few “big” things I want that’ll I’ll need about $800 for.
I make it almost paycheck to paycheck and it will take me at least 6 months to save $800 if I buy nothing else.

I quit work at 35 because there are so many things I wanted to do, and.paid work wasn’t one of them, am now 58.

Alas now there are just more things I want to do.

I don’t.

You won’t be able to, narrow your focus to 2 or 3 things at a time. If you lose interest, try something else.

One piece of advice I can offer (as someone with a similar wide range of interests) is that you should sometimes treat life like a field trip. If you meet an expert in something, ask questions and show enthusiasm. Experts (usually) love talking about their favorite topic. I know a gearhead who restores old cars who doesn’t talk much. But if I ask about any car, he will put his beer down and talk about different cars until the sun comes up. Chefs love talking about food. Most people like telling people about their life’s work (as long as you aren’t the type of asshole who tries to tell a Ph D they’re wrong because someone on the internet said something else).

Also, people say life is short. It’s actually simultaneously too short and too long. You won’t have time to be a Ph D level expert in all your interests but you’ll (hopefully) have decades to learn about whatever floats your boat. Life can get in the way but if you find hobbies you like, it’s restorative. Work and family responsibilities exist, to be sure, and lots of people feel too drained for hobbies but doing something fun isn’t draining.

“That’s the neat part, you don’t!”

Actual answer, ya gotta learn to prioritize what you can manage at any one time, otherwise you’re gonna bury yourself under the weight of mounting project pressure.

My boss and I wanted to do some fancy data formatting shenanigans this year, but I’ve fallen sick enough that we gotta backburner it until I can get back at full capacity.

Pick the most lucrative and least likely to result in burn out as a job. Read, watch, travel to learn about and/or experience the others. Most people have interests outside of their jobs. I work in healthcare and i like to learn about new things in that area, but i also spend a lot of time on gardening, cooking, crochet, cannabis, and cute animal videos.

I don’t. Or more accurately, I focus on what makes money so we can survive, and dabble in the other interests.

So in your example - become a psychologist, and just stay interested in the other stuff. Travel and learn about archaeology. Read and learn about zoomorphology, learn to draw and do illustrations, sell them as your side hustle. Do cosplay and be critical of the wardrobes in historical dramas. Use your other interests to enrich your life to the extent you can manage to enjoy at a pace you find best. And be mindful, don’t always focus on what you can’t do, be present in your life, live it.

Realistically you make choices and say no to many things so that you have the time and energy to spend on the few things you care more about.

I don’t. At some point, you’ve got to prioritize.

By being overwhelmed and not doing them all.

Or take meds and follow the daily and weekly planning I make every sunday.

Ill tell you if I ever do all the things I have to do on time.