If a poem is not memorable, there's probably something wrong. One of the problems of free verse is that much of the free verse poetry is not memorable.
Young writers only take off when they find their subjects. Since almost everyone has a family and stories about family, that is often a place to start.
One of the most powerful devices is to distort time, to go from human time to atomic time, geologic time. Sometimes you can actually accomplish that, with one unexpected word choice.