How would I go about constructing a comparative essay on the two films on Romeo and Juliet?

Thankyou so much, this really helps! I don't do too well
in English, haha. But I am still struggling abit, I am unsure of what to use for a
introduction, because I know we need to state a few things, like the play name, who by,
and then introduce that we are doing a comparision on the two films, but because it is
an analytical essay, I don't know how to put that into a paragraph
:(