How do you replace the 2005 Hyundai Sonata 2.4 l engine oil pump thru oil pan

What is your question?

I have a 2005 Sonata 2.4 l engine. #1 oil level is at full.at lower RPM oil light come on. it goes out at 1600 rip. I suspected a bad sensor/sender unit. #2. I have replaced the oil sender unit and light sill comes on at 1000 rpm. #3 I suspect I have to now replace the oil pump. ;{ #4 Can I replace the OIL PUMP thru the removal of the oil pan from under the car? Many of the videos I have seen show it is driven directly from the crank and is in the FRONT of the engine involving many more steps for R&R oil pump? Other videos have shown it is accessible thru the oil pan?

What makes this problem better or worse?

Low RMP

How long has your 2005 Hyundai Sonata had this problem?

New car to me.