There is no right or wrong. Nothing matters.
I feel like I have always known about this type of ethics in the back of my head but I've never really thought about it that much. Its really crazy to me to imagine people not driven by much morals or ethics that there is no right or wrong, saying that no matter what you do or say it doesn't really impact anything.
I also learned that Nihilism is almost the rejection of ethics and religious morals, but that doesn't mean that everyone who believes in nihilism is thinking negatively all the time. In this way of thinking nothing matters so that means that there is no pressure and you can try lots of things because it doesn't matter in the long run. But this type of belief can also be very negative, thinking that you can do nothing wrong so you just do anything not caring if it impacts others.
Another thing about Nihilism that I found interesting when researching a little bit I found that people with depression often fall into nihilism. Also some people think that existential depression is rooted in nihilism though I do not think that everyone who is depressed is nihilistic nor is everyone who believes in nihilism depressed.