Ny service engine light is on and Ineed to know how to reset it

If there are no issues, the light would go out. Something must be wrong.

Go to a place, like lube place, or a shop and pull the codes. Then you will know what needs attention.

Stuff like throttle position sensors, oxygen sensors, temp sensors (meaning fairly easy to replace), once you know the offending item. If multiple codes, do more research, there will be a most common failure item, like a TPI sensor. Do the statistically common one first, clear the codes, and see if the other item was reacting to the 1st item.... OFten it does, sometimes you have more than one issue.

For example, if TPI sensor made the engine really rich, the oxygen sensor may be covered and not work well....

First, read the codes using and OBD-II scanner. Then, clear the codes with the 'clear codes' button when connected to the scanner connector under the dash.