Hi, you don't need IT experience to become a Business Analyst. A BA is a role in all sorts of industries. With that said, being aware of what a BA does and then having a basic understanding of ServiceNow would be something you could strive for and then that will help you get a job as a BA.
I'm a Tech BA specializing in ServiceNow (SNOW). For me, I have close to an admin's knowledge in SNOW, which I obtained through an apprenticeship. If you are going to do anything regarding the implementation, or configuration of the platform, I would suggest going through this channel, other SNOW centered channels, and the "Now Learning" site from ServiceNow themselves. I did not have a lot of experience in my current role before starting, but I had the knowledge of the platform that got me the role.