I'm not too familiar with hydro but she does seems in good shape except for the bigger fan leafs, maybe ph is too low ? In any case they won't come back clean and all green so if the newer growth are okay I think it's what matter most.
If you want reference for LST I used this tutorial from SeedtoStoned and after a couple of hour knowing your plant, what seems to be way to much leafage doesn't seems anymore to be that big of a deal. Start by beding the main stem, taking care of not breaking it, sometime giving her a day or 2 to let to branch turn up to the light can help. www.youtube.com/watch
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