When you are riding behind another motorcycle, watch the road, not the other bike. You will make every mistake the other rider makes and more.
My only semi serious accident was because I was using their line instead of choosing my own and followed them through gravel.
Also, if you get any kind of chance, take your bike off road. I started on a 450 nighthawk. This is not a dirt bike but that didn't stop me from driving through road construction on the weekends/empty lots/dirty alleys. You learn a lot when you are forced to deal with low traction in an environment you have a bit of control over. Start slow and play around with intentionally losing traction under each of your wheels. It is easy for a motorcycle instructor to tell you what to do when your front wheel lets go but a lot more difficult to let go of the lever if you have never dealt with the issue.