Can I ,a very handy person, change the idle air bypass valve? If so, some detail

Yes, it is really just 2 -> 8mm bolts and a gasket. Disconnect your battery negative terminal for 5 minutes to let the memory erase, then when you start your car, let it idle for awhile. It will idle faster than normal, then it will gently come down to a normal speed. Then drive your car, it will take a few miles for the computer to adapt to the new idle valve.

SURE! AS LONG AS HE DOESN'T CHARGE MORE THAN $100.00 PER HOUR