Story doesn't really matter in the series. It barely exists, and what's there can be missed.
I would recommend going in order of quality. Play either Prime or Super Metroid first. Then play Prime 2, 3, Zero mission, and fusion. The original 2 games are frankly not that fun anymore, I beat them to say I did, and because Metroid is my favorite, but really they have aged awfully.
Metroid Other M is not a game you should play. Do you understand me dammit. Please for the love of everything, don't touch that donkey nut buried in turtle stool.