Working on the roof can be dangerous, especially the steeply pitched ones. I’m not going to tell you that it’s something best left to the professionals, because it really burns me up when people shill like that, but I am going to say that you might want to think about using a safety line if you do go up.
This removable roof anchor from SafeWaze provides a secure D-ring to attach a safety line. The heavy duty steel anchor work on roofs of any pitch. You secure the anchor over the peak of the roof, making sure you nail it into the rafters.
If there’s any question about how to use this anchor, I found a good video explaining the use of similar anchors on YouTube, because if you don’t attach your safety line securely, it’s worse than having no line at all. You can pick one up for around $25 before shipping.