Do you want to know if there is a God?
Your questions were directed at another, but they intrigued me, so here are my answers. (Feel free to ignore them. I won't be offended.) I would be interested in the answer. I do not know how relevant it would be since there are more variations in the possible character of God than I can imagine and many of them would have zero impact on me. Since I am also unaware of how I could come by this knowledge, the wish to know the answer is not high on my Attention List.
What is it you do believe?
I generally believe nothing, other than in the colloquial sense. e.g. "I believe I shall have breakfast shortly".
I do, however, as a practical matter, accept many things as probably reflecting reality, or certainly being the most likely explanation for what appears to be reality.
Belief, though, demands an unwarranted assumption that what appears to be the case is the case. I have little regard for "eye witness testimony", whether my own, or that of others.
Do you believe it is possible to know, or that some people know there is a God?
It seems many people think they know God. They appear to be confusing "spiritual" experiences, generated by chemical fluxes in the brain in response to environmental factors, with divine revelation of some sort.
I find it more helpful to interpret, experience and enjoy those spiritual moments in a pacific, pantheistic way. But whatever turns your gears, so long as it does not adversely impact on others, or the environment.