Ok :) I have a crop (it's broken and doesn't have the wide part that makes contact with the horse) that I gently tap her with, if needed, and she responds. Sometimes if I tap her lightly on her inside shoulder, she'll bring her head toward the inside at a corner, but not always. Like I said, she's still pretty new at it all so I'm not expecting her to be an expert within a few months. I'm moving slowly as to avoid any future harm to her.
At a stand still, I'll put pressure on the reins/pull her head slightly toward my toe, one side at a time, and she'll end up putting slack in the reins by bending around and touching my foot with her muzzle.
Loosie, I've been told that most horses are mature around 5 or so and draft crosses around 7 or so... I hear something different from everyone haha. That's why I'm always confused about the extent to which I train her - everyone has their own opinions and knowledge... As of yet, I only trot her for 5 minutes in the ring after walking/lunging her for a bit as a good warm-up. I don't go crazy at all with her. I'm actually really hesitant, slow-moving, and low-impact with her training. She's still coming along really well though - she's incredibly smart... And no, I don't weigh that much that it would cause any harm or discomfort on her back.