I can teach you but only if you have a solid understanding of the basic concept behind DIY. You need to do some research first so you understand the basic concepts and terminology of DIY. Here's a great place to start.
My blogs will give insight into all aspects of DYI, from steeping to what supplies to have on hand to a basic walk through mixing your first E-juice.
E-Cigarette Forum - dannyv45 - Blogs
Then read hoosier's blogs. These blogs concentrate on fine tuning your mix and give insight on additives.
E-Cigarette Forum - Hoosier - Blogs
Then read Boletus's blog's. These blogs concentrate on formulation of nicotine bases regarding proper calculations methods for figuring Nicotine concentration as well as safety.
E-Cigarette Forum - Boletus - Blogs
Then read Ginger's book "E-Cigarettes 102: DIY E-Liquid". It is a book which I've contributed to that delivers an in depth easy to follow guide in the art of DYI.
E-Cigarettes 102: DIY E-Liquid
I recommend viewing VPLive Vape Team Episode #82: DIY Safety and bookmark it for future reference. It explains safety in all aspects of DYI.
VPLive Vape Team Episode #82: DIY Safety
List of suppliers and other useful links courtesy of ECF Member Sir2fyablyNutz
https://www.e-cigarette-forum.com/forum/blog-entry/list-of-suppliers-and-other-useful-links.7457/
then read the stickies at the top of the page.
this will explain a lot of the how's and why's.