Just don't wait too long, I had a lovely Jersey heifer that we waited to breed. And waited and waited. By the time she was 2, nothing worked, she never did get bred. I asked a beef farmer friend of mine his opinion. He said if they aren't bred before age 2 they often won't take. Which explains our dilemma. Had to sell her for meat price.
The ones I've had lately were all Jersey, so this only partly applies to your girl, but they have all calved at 21 to 24 months of age and did perfectly fine. They weren't near as nervous as I was, LOL.
Good luck with her, from another Hoosier who loves cows