How do you gain faith?

I would say I’m more of an agnostic. The thought of there being nothing and the thought of there being a god are equally as mind boggling to me. But I WANT to believe in god. I just can’t bring myself to fully believe. I feel like there will always be doubt in my mind but I don’t want there to be. I envy the people who whole heartedly believe in god and I wish I did. Is there a way for me to achieve this? How does one gain faith so ironclad?