Different poem structures I can use?

Personally, I don't like to start a verse with the same one or two words every single time. You need to work on a solid rhyme/rhythmic scheme. You can use A-B-A-B as a rhyming-scheme. or A-B-B-A as a scheme, another example is the A-A-B-B scheme, although, in my opinion, that's a little bit child-like rhyming, you can start your verses with observations, things you have seen, that's how I write my poetry all the time. Just think up a theme, and write down a few verses, scrap a few, edit some, it's all trial and error.