I can't finger myself.

I've tried multiple times but I could not really get it into the hole or I stopped because I felt too uncomfortable. I'm just worried bc everyone says you need to know yourself before you start seeing people. I imagine that this would be more of a problem if I was with a guy rather than a girl. I'm also a virgin. I only try when I'm very wet so that's not the problem. Maybe I need to use a mirror? Anything would help thanks.