File your fingernails with a nail file before using your bag. It makes the tips of your nails smoother and less able to scratch the bag. Also, you may want to consider leaving the zipper open when you wear the bag. The contents won't come out. This will mean that you won't need to rush to get into your bag if you need to grab something because you won't need the extra time to open your zipper.
With the zipper opened, insert both your hands into the opening with your fingernails against each other (so the back of your hands are touching). This way, the skin on your fingers will contact the leather first, not your nails. When your fingers are inside the bag, then push against the zippers to widen the opening in order to grab something you need from inside. You'll get used to this quickly.
Thanks the tips!! [emoji1]