Most of what I learned was when I was reading studies and data back when I was in University before I got kicked out. I don't really think many people came to the truth the same way I did, and I don't think its for everyone, but the quick rundown is, everything I studied and learned seemed to point to as a human, we should care about reproducing and a purpose in life, because that is literally why we exist. It is our pre programmed biological purpose to want to grow as a species, and reproduce, and when I realized that certain things seem to line up almost perfect with evolutionary biology, certain ideologies for example, traditionalism, eugenics, etc, it's only natural that if you want to fulfill your duty as a human, you should do what you can to propagate and spread the truth, and said ideologies which will benefit us.
Inceldom believe it or not is caused by dysgenics and a destruction of thousands of years of cultural evolutionary progress, various different races and peoples of the human species were performing a form of natural Eugenics to domesticate females, using certain religions, and ideologies, and authoritarian governments, to make females make biologically better decisions in the mate selection process, so instead of choosing mates for a warrior class, which is no longer necessary, they would be more likely to choose mates who would help benefit us as a whole, or at the very least allow for more men of other chastes/classes to breed so more roles could be fulfilled as a species.
There is a purpose to living, the reason why people, typically men, feel nihilistic nowadays, is because that purpose has been taken away from them, thousands of years of evolutionary progress which lead to their birth, has been stripped away from them, and they are now no longer able to reap the rewards of that progress and continue being able to breed and be a happy productive member of a race/species.
But it's not completely over, because we still know from the science and data what works and what doesn't, and why, etc, and if you at the very least want to escape Nihilism, I would suggest advocating and participating in groups/ideologies which will lead to the end of Inceldom, and back to tradtionalism, in any way you can, and also studying up on what our purpose is a human from a scientific perspective, even from a racial perspective, even if you're not white. As all races should be able to survive and breed with their own women.