f you haven't worked with an agile team before, chances are you won't be too familiar with some of the terminology they use. Lucky for you, we're here to help! Here you can find the four primary principles of agile project management. It's a mouthful, but pretty straightforward stuff in the end. Read once, remember forever!
Agile product development is iterative by design, so naturally the managing aspect of said development has to follow suit. However, it has to be said that implementing this kind of structure should be done on a case by case basis. There's no fixed duration or scope for epics and initiatives and such, it doesn't really work like that.
The most important part is having a flexible way of product planning. Because in an agile environment, one of the key characteristics is being able to quickly respond to feedback, to build products that customers love, faster.