She looks pretty young. The first step in determining your dog’s maturity and trust level is to see if they will follow a treat. Hold a treat in your hand, if the dog focuses intently on the treat and will follow you for several steps it is ready for leash training. If she is all over the place and doesn’t focus then just give her love, attention and play until she’s ready. You don’t need to rush things. That will just cause more anxiety and her and disappointment in you.