If nothing is broken or worn, often a new coil sleeve, coil stop, return spring and adjusting the end of stroke switch so it doesn't engage too early is all you need.
Also, inspect the flipper bushing and bat for cracks.
New coils are expensive and usually not required. If the old coil sleeve is stuck, this could point to a swollen/bad coil, but otherwise just change the sleeve.
I think this was my first major repair as well.
Congrats.