Find a multiyear walkthrough that will take you hours to just play the game according to how a manual tells you.
Why? It's like learning Ruby on Rails with Michael Hartl. You follow his instructions to learn more than just mechanics, but the Rails Way of doing things.
Same with Dwarf Fortress. You need to learn the DF way of doing things, the DF way of solving problems. Easiest way to learn it is to follow deep instruction for a while.
I learned from YouTube user captnduck back in the day - they're great tutorials made all the more appealing by the guy's incredibly soothing Dutch accent.
The YouTube series by captnduck is noted for being particularly helpful and comprehensive. But I think seeing several people's playstyles is good once you figure out how to not starve.