Nothing could convince me there is a god.
I simply don’t believe in any sort of god at all. No heaven, no hell. When you’re dead, you're dead.
You are welcome to your own beliefs. I won’t impose mine on you and don’t impose yours on me.
As such, for claims that haven’t or can’t be proven by the scientific method, the burden of proof should probably lay with the one making the claim, not the one defending against it.
Of course, in my experience, the scientific method is fundamentally incompatible with most modern religions. Hence, there is really no need to discuss these things, as much as I’d like to. You’re just going to come across as imposing and/or tone deaf.
Even if it's turtles all the way down you still have the problem why does the infinite turtle system exist at all?