We actually just started last month. My oldest is nearly 7.
I don't have a formal curriculum. My plan is to do what we did for learning the language they are growing up with. Getting familiar with the alphabet and phonics together (helps that the new alphabet is phonetic!
). Then gradual introduction into reading and writing together, and later on developing all of that into a more mature grasp of the language.
Right now we're just working the alphabet like they did as toddlers with English. See the letters, say them, sing them, see them again, point out a few most basic words so they can understand that the sounds can be put together.
After that will come vocabulary and writing, and after that will come punctuation rules and grammar.