Offshore - Honestly it is not that difficult. Just take your time and watch lots of tutorial videos on the step you are trying to accomplish. Then try it on a scrap piece of leather.
I recommend getting a scrap piece of leather to make a holster and a good piece. Perform the task on the scrap piece to get a feel for it and work out any mistakes. Once you are happy with the task at hand, perform the task on the good piece of leather.
One step at a time and you will have something that you can be proud of.