One thing you can do is to actually read the Bible. You don't have to become an evangelical to get meaning and use out of it.

Here's a great example of how to read it:

https://thoughtcatalog.com/ryan-holiday/2017/08/everything-y...

You can keep the supernatural stuff at bay and just use the Bible the way it's intended to be used, as a repository of wisdom. It's got a bunch of really cool stories in it that are also really dark and rich. They don't just have one moral. You can see yourself in any of the characters in any of the stories and it will show you what to look for and how to respond.