You will never get physical proof out of the spiritual realm. That's just as silly as waiting for a mouse to give birth to a cat. However, there are two other options. One is to seek and find God, which is in your power to do. What efforts have you made in this regard? The second is to accept the testimony of others. Yes, Biblical testimony is sometimes difficult to understand as it takes enormous study for those of us who have questions. That, too, is within your own capabilities.
Choosing neither option means being quite satisfied with one's current conclusions. Nothing wrong with that, either. Simply accept many people have chosen a road less traveled than that one of their own conclusions. Remember the quote where it is pointed out that a conclusion is the point where one stops thinking. Therefore we want to be very sure there is nothing more on which to think.