Robert Zemekis’ "The Polar Express" is one of my favorite movies to watch during the Christmas season. Whether it’s religious or personal, this movie is about believing in something you cannot see or finding your way back to faith.
Nonbelievers disbelieve in particular religions for many of the same reasons believers disbelieve in the religions they don't believe in: the lack of convincing evidence for it
I believe the simplest answer to your question would be that no one forces a non-believer to do anything unless the non-believer gives their permission.
First, practice as what we do with our time. Understanding faith through this lens invites us to ask, “What if?” What if church is not primarily about intellectually assenting to a set of ideas?