Well my car won't start and I think it's the fuel pump. But I don't know where it is. Can someone help me

Gas tank. I'd suggest reading sections A and B and running through the outlined tests:

https://www.askmehelpdesk.com/cars-t...ics-46563.html

For a honda 90 accord the fuel pump is right under neath you back seat plat if its got a cove or you take it out straight from the trunk if not you will have to drop the tank there is four 10mm bolts and one more bigger one you will have to loosen and it will slid right out

Here is how to replace the fuel pump on the honda of which you speak
Honda Accord fuel pump and fuel tank removal - YouTube