look at this link if you don't know any thing about maps reading

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i don't know your education level so i don't know how to advice you
but generally, there are alot of maps kinds, and every one has it's own way to read, magnetic, velocity, petrophysical property,sequence stratigraphy, satalite ..................etc are very different kinds of maps, no relation at all between them, so it's better if you told me if you are a geologist or what else or what is your year of study if you study geology
because usually geologists have alot of courses deal with maps espicially the structure maps and surface maps as well.
if you mean what you was talking about (depth structural maps)you need only a practical structure course , you MUST train your self to draw contour maps by your hand not by software, and draw structure sections by your hand also, you must do,

i recommend this book for you

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