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Help with poetry analysis required.

Hello everyone, I am a maltese student studying english literature at A level standard. I have to write a crytical analysis of a poem, sonnet 24 by Elizabeth Barrett Browning. I am completely lost, don't know how to start off, what to include and how to end, as i've never done it before. If anyone could possibly help, i'd very much appreciate.
Thanking you all in advance for your help and attention.
akimea

The Poem :

Let the world's sharpness, like a clasping knife,
Shut in upon itself and do no harm
In this close hand of Love, now soft and warm,
And let us hear no sound of human strife
After the click of the shutting. Life to life—
I lean upon thee, Dear, without alarm,
And feel as safe as guarded by a charm
Against the stab of worldlings, who if rife
Are weak to injure. Very whitely still
The lilies of our lives may reassure
Their blossoms from their roots, accessible
Alone to heavenly dews that drop not fewer,
Growing straight, out of man's reach, on the hill.
God only, who made us rich, can make us poor.