cougar oil pump can she do it????:) :(

I have a 1989 Ford Tbird with a 1990 Merc Cougar engine 3.8.
I just changed the oil pressure switch not the prob still low oil pressure so I am goin to attempt the oil pump myself, any suggestions? Is the oil pump a no brainer on this car. I work at advance auto parts but I only fix my cars when I know I can do it for sure otherwise I have a mechanic, but lately he is gettin a lil pricey. So heads up please can I hang????hi again

We can't tell what your skill level is so buy a decent repair manual or check one out at your library so that you can read how to do it. If you have the right tools, it isn't hard to do.