Religion itself does not fill the inner void. It can serve as a tool for this. Religion is not suitable - use another tool.
The inner void is filled only with the inner content. I emphasize - internal, your personality. And for this you need to develop intellectually, psychologically and, I'm not afraid of this word, spiritually.
"So century after century - how soon, Lord? -
Under the scalpel of nature and art
Our spirit cries out, the flesh is exhausted,
Giving birth to an organ for the sixth sense ... "
There is a lot of information about human nature that can be studied: - socionics, - human design - transurfing of reality - existential-archetypal typology - system- vector psychoanalysis Etc.
You do not believe in religion, believe in ordinary good and in yourself. Start to develop and believe that good should prevail. Science is always opposed to religion, so you can direct yourself in this direction. In general, any void is filled with something strong, like love. Ordinary human love. Find a half and stick together, then you and the gods will be superfluous