Allow me to address the question of nihilism for the exbeliever. I’ll try to be brief. Moving from belief to specific disbelief you correctly state removes a lot of values, but I will argue, from my own experience, that’s its only temporary. Like me AFAICT you have metaphorically put out the trash and the house is pretty empty. Time to buy new furniture; first rule is avoid harm to self and family and further on out into society. This makes some type of morality a necessity, and it is not going to look like the one with religious clothes on. Look inside yourself, you will not be suddenly inclined to murder lie and steal, but now you need to underpin that inclination with moral theory. I am going to suppose you have a standard measure of ordinary human decency inside you, and that makes you not a criminal if we observe your behaviour long enough. Nobody’s perfect and such as society functions it’s not necessary to be. We co-operate just enough to survive. We are like that by virtue of arriving here a successful thriving species, more or less. That we are short sighted and are endangering our long term viability I will hold back on for now. Really that’s it in a nutshell, try to survive while remaining a decent human being, true to yourself. It is a workable system of morality IMHO. And watch the drugs they wreck plans and intentions. Peace.