Star Wars Movies!!!!?

So the thing is my friend got me into watching star wars. The only movie I have seen so far is the umm the latest one when it shows how anakin became darth vader. since i want to watch all of the movies i don't know where to begin since there are so many of them. So which one is the first one I should watch. and is it possible to have like a list in the order that i should watch them. thanks!