All it will cost you is an hour of your time--experiencing it for yourself is going to be worth way more than hearing any number of us tell you what it's like.
If you find it too "religious", try a different meeting. There can be a lot of variation between meetings, and even between individual people within a meeting. And there's always that saying from AA/Alanon, "take what you like and leave the rest." If you find 90% of what is said really resonates w/you and 10% leaves you cold, well, disregard that 10% and take what you can use.
As mentioned by others, it seems most who have posted here about their first Alanon experience have found it very good. I hope you find the same.