Hello and welcome to the Forum. Have you done a search here to find all the prior threads that discussed working with leather and reviewed them for help/information? I just did a quick search and found a number of threads discussing working with leather (I have not yet done so cannot give you any specific help myself). You can find the results of that search here:
search.php?keywords=leather (note that it says that 192 matches were found but that will include any answer in the same thread so there are not actually that many actual threads. You can tell the "topic" of each thread from the post title. You would only need to look at each thread once so you could "skip" over the additional answers showing for threads already reviewed.)
Further, one of the first links in that thread has a Webinar video that was done on the topic of "debossing" leather. That thread with the link to the webinar video can be found here:
viewtopic.php?f=54&t=5724&p=94179&hilit=leather#p94179 As a result, if you are trying to "emboss" the leather you may want to do it in reverse on the back side of the leather. Beyond that, I am not sure unless Dawn
Thyme who I know has done work with leather can give your further details/information