Shin Splints and running help, please!

Hello,

I've recently destroyed my bike and decided that instead of buying a new one I would start running as a form of cardio(which on the treadmill I'm enjoying more). However, I constantly get shin splints like there is no tomorrow and I don't understand what I'm doing wrong. I can only guess that it's the way my foot is landing and taking off however I'm hoping reddit can point me in the right direction as to where to start.

I'm also primarily focusing on the treadmill, if I do sprints on the treadmill will that help my sprints on say a regular trail or street running? How well does the treadmill compare to actual running? It's getting hot here real quick...

Anyways, I appreciate the advice in advance.