Nothing has been proven to have been first, that you claim it was your invisible stone cutter is totally without foundation. I can admit that we don't yet know how everything started and who was first... and just because I don't know doesn't mean that I'm going to make something up like you do.
Sigh. Open a science book. All agree the universe had a beginning. What caused the beginning?
Or, are you going with your own theory (something made up

) that the universe did
not have a beginning?
If you decide to go along with science that the universe
did have a beginning, then science presents two options: An intelligence that exists beyond space/time; or, that the universe came about from nothing. In either case, at present, science has no way to prove or even theorize about either.
In today's conversation with you, I am speaking outside religion. I've put on my other hat--science. I'm advising you on how science looks at it. I'm not saying there is this greater intelligence (what people of faith refer to as God); and I am not saying the universe came from nothing. I have been trying to get through to you that these are the two possibilities scientists currently face and (currently) have no way of exploring either of them.
I have not been arguing "the only possible solution" to this stage of reality. I am simply pointing out what the two solutions are. If you can come up with a third, I am sure science would be delighted to consider that one, too.