Looks good to me. Maybe could use a spritz of moisture?
You can begin topping and training your plant any time now.
The simplest way is to take off the top, usually just above the current highest set of leaves. Just pinch it off (and eat it!) and within a couple days you'll have 2 tops growing from there.
But it depends what your plan is. There are many strategies and techniques. Some people prefer au natural (just let the plant do its thing). I tend to do a little topping to keep my plants shorter and bushier.
What have you fed it so far other than water?