Car won’t start

I jumped off my four with another battery then I put the original one on but I hooked it up backwards and drove around like that for a day my car was working like normal then I get stuck in a mudhole the next day when I get pulled out my car is dead so I need a job and I find out my battery is hooked up wrong and you don’t want to work positive to positive negative negative it only works backwards so I go home after getting pulled out turn off my car when I try to started again it won’t start so I replace the fuses that were blown and my cart now turns over but won’t start then I find out I have water in my oil from getting stuck in the mud hole I’m not sure why my car isn’t starting it used to make a noise when you turn the key like a humming know it doesn’t do it and it only turns over but won’t start so my accessories don’t work I’m not Siri it’s because the water in the oil or something to do Electrical and why that humming is gone I drain the oil already took off the spark plugs turn the car over to see if water shoots out but none does I want to know what that humming is before you start the car and why is it not there anymore I’m guessing that’s why won’t start