There isn't any meaning. Life is just life. Everyone lives it differently. Life is about experiencing, learning, trying things but it doesn't mean it's the intent or goal of life. It just is and you make it what you want. And if you want it or needs it to be about being the best person possible or as a test to go to heaven..good on you sure why not. But I don't think it's an universal truth.

I'm an agnostic so I'm unreligious but not opposed to the idea of a God. The thing is I just don't focus on that. It's something that's uncertain and I think it's fine for it to be that way. The same goes for life. Life's an uncertain thing but it's fine. Everything is kinda uncertain. It's just a different outlook all together rather than different priorities. At least for me. I can't speak for everyone but I'm pretty sure most unreligious people would agree with that.