The front panel header is pretty straight forward. They even color coded it for you, on both boards no less.
USB ports look to have a little extra, but should also be pretty easy to deal with. But you don't actually NEED any of that stuff. You can just hook a switch up to the power button and call it a day.
But a new chassis is far easier. Got to a second hand store and find any if cost is an issue.
You would pay at least $100 to a tech to do a job like that, if not more.
I could see if there are existing adapters out there, plenty of companies make stuff like that. But again that is putting a lot of money into it vs a new chassis.
PC Assembly is quite straight forward, no real confusing parts even back in the 3rd and 4th gen Intel days.
All you really need is the motherboard manual and a Phillips head screwdriver.