When someone tells you - you should only do a certain thing once, no matter how good it feels: you should listen. Now it will be quite difficult to identify with the main character here - to be honest, the opposite will likely be the case.
Now onto the ... core of things (no pun intended). You should not be easily offended or disgusted. Otherwise the movie will kind of freak you out - not in a good way. The premise of using ... a hole without much knowledge is something I personally would never do, not even if I was paid a lot of money.
That all being said, the movie reaches its logical yet twist ending in quite the interesting fashion - with blood and other special effects being a big part of that journey. Can you dig it? (quite literally actually)