Nice first grow, its a little spindly and not branching much, which means less yield, but your ok.
and no, its not too late to LST. I LST'd a 6 foot tall plant last year. just bend like 1 inch a day, so that you don't break the stalk. keep doing so until its all the way over. Looks like a nice healthy plant, but i too would let it grow much more until flowering. Maybe you could dual-spectrum it.
Anyway, if your running out of space, top it, that would allow the branched to grow fast. top it and clone the top that you cut off. Awesome so far +rep for going balls out.