Seems to me that anybody who is convinced God is interested in them could contact Him by prayer and nobody under any circumstances could stop God from answering your prayers.
And yet....
It is never that simple!
Ask yourself WHY that is the case.
Why do we think we have to stand on one foot and rub our tummy while reciting a poem to get God to listen?
That is what religion does for us: it heaps "requirements" upon us which separate us from our friends, loved ones and especially God.
How? It creates a sense of personal guilt over what you aren't doing.
The only thing worse than believing in God by yourself is saying it out loud!
God seems to be the intellectual property of religion! They'll all but sue you for stealing God from them by not attending their rituals.
Seriously, God has become a PRODUCT. That product is manufactured under BRAND NAMES. Each has a purchase price.
You figure how big and expensive a God you can afford and you pull out your credit card. Presto!
I'd frame your question differently. How little of a religion can you accept and not feel guilty?
Where comes the guilt? Why put up with the crap?
Why not cut out the middle man and go for God wholesale?
That seems to be a better deal!