if u get yourself a manual, it shouldnt be too hard.
just relieve the fuel pressure, make sure the car is on E or siphon the gas.
drop the tank (make sure you have a couple jacks/jackstands/helper cuz they can be fucking heavy if it has gas in it!)
from there it should be a cake walk.
just make sure to replace the washers/orings/gaskets cuz you dont want fuel leaking and have to take it all back apart again.