You've done it like someone who has follow a step by step method and you've done it right. I can't see any things wrong in your LST , maybe you could use LST + topping to build a bushier shape ans increase the secondaries growth while keeping the a flat cannopy.
i would keep the plant tied down the entire grow the whole idea is to keep everything at the same level i bend the main stalk over and leave it till flower and use ties to keep the other branches down but it looks good so far if you check out my uk cheese grow you can see how i did itgood luck