English question about conditionals (Details inside).

It’s a question about unreal conditionals. I would just like to know the exact unreal state (present or future) from the following sentences:

Here I go,

If I were believing in God, I would be called as a theist.
vs
If I were to believe in God, I would be called as a theist.
vs
If I had to believe in God, I would be called as a theist.

How can you compare these three?

If I answered your question correct/correctly, what would you gift me?

Correct or correctly- Either of these work?

Your answers will really be helpful.

Thanks in advance.

Have a great day ahead!