Use The Egregore principle
Let me introduce you to the Egregore principle: If everyone believes it being true, then it is true.
I will give you one real world example: In our world, thousands of people believe that The Force from Star Wars franchise is real. So you can enjoy it and Use The ForceTM in this world. All you need to do is to believe.
I was googling hard for a guy who uses The Force for healing purposes, but came empty handed.
In your world, you will have lots of people believing the Gods are real. They will also believe that you can talk to Gods. Using this principle we may safely assume that the people will actually talk to the Gods
But beware of the Mickey Mouse
I will explain this term by real life story: A gay friend of mine told me that his father was actually gay too. But because his father grew up in different times, he did force himself to get married and have heterosexual intercourse.
My friend called this "The Mickey Mouse": You go to the church (because everyone else does), you say the prayers, you offer the offerings... but deep down you actually do not believe of God(s) being true.
Doing "Mickey Mouse" will ensure you the same priviledges as to the people who actually believe. And if there is no punishement for just going to the church but not actully believe, you might end up with bunch of Atheists who say the prayers just to survive.
And I can tell you, that as someone from former communist block, this option is very true. Czech Republic was full of people who were going to Red marches, wawing communist flags ... but they stopped imediatelly after they knew there is no punishment for not attending