Check engine light

Or slow down!

Our highway speed limit is 75 don’t think that’s a option for me to slow down because that can cause a reck.

Apologies. Max anywhere close to me is 70. You might try spark plugs first and then coil packs (and wires if so equipped).

First off ignore your step dad, he clearly doesn't know how to help you. Second, if the car's computer says to deal with an O2 sensor, then deal with an O2 sensor. Don't go off and randomly start replacing things that are unrelated to the problem. The auto industry didn't spend millions developing those self diagnostic systems for their cars because they had nothing else to do. O2 sensors fail all the time. I have 4 cars and 3 of them need O2 sensors or are at least giving me O2 sensor warning lights for various reasons. The good news the car will run just fine with a bad O2 sensor although it gets poorer gas mileage. If you have to pass an inspection (which I don't) you will need to fix it, other wise just keep on driving until you have the time, money, or inclination to deal with it. But don't just randomly start replacing part hoping the problem will magically go away. The only thing that's going to go away is your bank account.