"I know I need to break the isolation, but I fear I'm too deep into my own world."

You're not. You're just afraid you might be.

I feel like I'm breaking through a similar feeling in my work place, so I can relate to the feeling. But talking to coworkers is helping me to see the similarities between how we think and lessen the feeling of isolation.

So just try talking to some people who might share your interests, and see how it goes.

Go find a local meetup, or do volunteer (tech) work for a charity, or tutor/teach, or find a pen pal / forum buddy working in a similar space. -- do something to put some social contact in your work.

"I know I need to break the isolation, but I fear I'm too deep into my own world."

That's the procrastinator in you talking. Or the fear that those things you create won't go big and solve your dream. Forget the YC path and build a side-project/lifestyle venture that is interesting or challenging, and get a good routine going. Maybe it takes off, or maybe it's a steady side-project for a few years - no shame in either.

Build anything that gets you early users as eventually they will take over and be demanding features that give you the impetus you need.

Get a job. There are benefits to jobs beyond being paid. 6 or 8 months of "office space" ought to get your head straight.

You are not in a good place emotionally. You need to see a counsellor.