Is this a turn off?

Would it be a turn off if I mentioned to a girl I’ve been seeing for 4 months now that I’ve never been in an actual relationship before? For context we are both 22 but she has a 1 year old kid. The reason I feel the need to tell her is because a lot of the time I’m not sure how I’m supposed react to certain things as this is all new to me. I’m thinking this brings a little clarity so I’m wondering if this would be a turn off and if I’m better off saying nothing? I feel like I sometimes don’t know what I’m doing as this is all still new to me, I should also be clear that we are not exclusive and are just talking.