There is a very clear answer to the question of "is there a good reason to believe a god exists?"
The question in the OP was actually, "What makes your religion more "right" than the others?"
That led me to post a bunch of pages that compare all the religions.
Major religious groups - Wikipedia
The Big Religion Chart - ReligionFacts
2.4 billion people follow Christianity.
1.8 billion people follow Islam.
1.2 billion people follow Hinduism.
My points were that Christianity has stories from 2k years ago from people drunk on wine, or the story was told years after it happened, and America needs a US Bible. 2.4 billion people don't care about the superpower stories of Jesus Christ (coming back from the dead), the ark, and the flood being fake. However, I do. It's like watching WWE on TV. You know it's fake, yet thousands watch. And if someone interviews a wrestler and says it, they get punched in the face. That doesn't make it real. Yes, they are hitting each other with chairs, jumping from the top rope, and throwing each other out of the ring, but the punches are fake. Yet it's a top rated show Friday nights on Fox, and thousands go to watch it live.
The number of followers of Christianity is dropping. The Catholic church would have something to do with this since their pastors are raping little boys while telling everyone how to live. The Pope lives in a walled palace called The Vatican, yet tells the USA to be compassionate and open the borders. We're supposed to follow advice from an old man wearing a dress who lives on the other side of the planet. 1.329 billion people believe in that form of Christianity.
I don't have any desire to follow the top religions, because they are based on stories that happened 2k years ago. Yet all those people follow it, and believe. They sweep aside the superpower stuff that makes no sense, just like the Quran is a "peaceful" religion. People like me would then become an Atheist, but they believe there is no God. That's not the answer. One can believe in an all mighty God or next dimension without following a top religion.