Recently I wrote an article for the NCOWS Shootist on how to make a basic Mexican Loop Holster.
Below is a link to a web page containing the article:
http://www.johnnymccrae.com/MAKING_A_MEXICAN_LOOP_HOLSTER.html I've been doing Leather Working for around ten years. Most of the work I do is for myself and friends.
Virtually everything I've learned about Leather working came from the CAS City Leather Workers Forum.
Many thanks go to Marshall Will and Ten Wolves for moderating this great forum also to everyone who contributes their fine work and input. There are some very talented Leather Smiths on this forum who produce some excellent work at reasonable prices.
Hope this may help someone starting out.