No, that was a good choice! We usually say that newbies shouldn't shoot under 200-- later, as you have more data on Harley's patterns and response to insulin, you may be able to move your "no shoot" number down, but for right now, this is definitely the safe way to go. It's also a good idea to get some mid cycle tests in when you do shoot-- not only to help hep her safe, but to see what a particular dose is doing for her.
How is the food transition going? What are you feeding her now?