I feel reality is weirder than what most simulation theories aptly describe. The idea of there being NPCs or not and things being not really all that real and the afterlife being your real life or something aren't compatible with a few understandings those who have lived can tell you are true:
Life has its own will.
Your own will manifested through the personal, conscious exercise of it can make this will bend to your actions. Sometimes.
Your conscious will is nonetheless in synchrony with the Will. Life is a series of images of moments that have already passed.
Time is weird. Living is weird. Thinking you're inside a computer doesn't even come close to explaining all its oddities. Like meeting a woman and knowing you'll sleep with her. Like saying goodbye to another and nonetheless knowing there's more to come, in some way. Like your imagination showing you what you're meant for, from the moment of your birth, and guiding the way. Like dreams you've already had but forgot either in the future or the past resurfacing at a very exact moment to shock you, to tell you something. Like taking some action unconsciously and knowing it was necessary in a way or another. Like reading the way and the will and understanding them in their senselessness. Like chaos unfolding in order. Can simulations even be chaotic? Can the chaos of sex, of bonding, even be simulated in its entirety, the complete mess of insides turning into an absolute mess, glans coming together, fluids blending, stares mingling, souls being shared in their nakedness, one desiring and one desiring in its relenting, can any of it? The tragedy of solipsism comes from loneliness. Don't let it win. It's a constant battle, sort of like how you need to clean your house or your dick to ironically keep the opposite of entropy (and entropy in its entirety) from settling in. There are no paradoxes in irrationality, can that be made in anything but an organic process?
