Try existentialism. What it boils down to is that there is absolutely no meaning to life whatsoever. It is, as Sartre and his cronies declared, "Absurde" or meaningless.
But anyone who accepts this meaninglessness is at liberty to give to life whatever meaning s/he likes. You can be an atheist existentialist, a christian existentialist, a buddhist existentialist, a pagan existentialist - or whatever. You just have to say, " I impose my own meaning on life, so I choose to believe - - abc or xyz. So there".
I have to say I have tried it, but I can't get past the meaninglessness bit. Which is where I quite contentedly stick.
I don't feel life has to have a meaning, except the ultimate, basic one of procreation.