Do it yourself. All are easy jobs. Do not need to flush the fluid, drain and refill is good enough.
Go AutoZone, ask for engine light check up(FREE only in auto-zone). When you got the scan code(they will give you simple description), google the code to see what is really happen.
I love to help people. I started car repair from student time in USA. Call me at 678-591-7291, tell me the details and I may give you some advice. If professionals can check your car for free, go ahead. You can decide later if you want to spend more.
A 168 friend