there are videos on youtube on how to frag. search frag coral or frag leather, also with leathers they are very tough I recently cut one in halt and both halves are doing very well to date.
I was also very hesitant but research and you will be fine. since my first fragging experience with my leather I am still observing and learning.
I have a short thread about my leather here if your interested
https://forums.saltwaterfish.com/t/309732/lobed-leather-stretching-for-light
I will update pics on Monday. None the less keep asking and searching to make sure you are doing the right hting before you so anything.
good luck