I would like help you, but give me an idea please what is your level of technical knowledge and what you need?! Are you a technical individual or just a hobbyist looking to learn to read technical illustration! the reason for asking is that 2D drafting is not a universal description; for example, 2D drafting for Mechanical engineeering is different from 2D drafting for Architects or even 2D drafting for Civil Engineering.
I can point you to some of the document to help based on your needs,
Here is a link that will take you to the NASA pdf file for drafting standards. also, try Youtube for lectures of drafting. Remember, there is the ISO standards (International) and ANSI standards (American).
if you are indian i can tell you best book for having all over knowledge about reading engineering drawing, the reason why i asked you about country is because in India we use 1st angle of projection and in Europe we use 3rd angle of projection.