Is there a way to test my fertility? What are my chances of getting my wife pregnant?

I'm 26 and my wife is 24, I'm trying to get her pregnant since 2018, though we haven't had any luck. I've read that it can be linked to your genetics, your day to day activities, nutrition, etc. Anyone have any personal experiences with the problem. I'm starting to think it's me but my wife is just started her checkups to see if there are any issues. I want to know more about this issue.