You have these usb-c to mini jack adapters. They are like 5 to 10eu. They are small enough to keep them attached to your jack headphone. It works perfectly for me.

I think it is better to view the usb-c plug as ‘one protocol to rule them all’. If you do so, it makes quite some sense.

i don’t even know anyone or anyone.

You don’t have to know the person to reach out!

Go to a book store, search online, lookup products, search for events, etc

Look up artwork of books, comics, albums, posters, events, flyers etc of stuff you like. Try to find the visual artist, see if they have a portfolio. Contact them discuss a price that might work for you.