First LST attempt, any good?

So far, so good! If I were you, I'd let them grow out a bit before doing more - you're getting quite a bushy thing there and the worry is the leaves all rather mashed together which will give you trouble if your space is too humid so make sure you've got your fans going at least gently ... I don't see that you're recording humidity and that's something you should measure and be aware of... the other thing I see in your diary is that your pH is a bit too high... yes, they say to grow cannabis between a pH of 6.0 and 7.0 but the mid-range of that is better - and as you get into flowering, you're going to want to lower it even more - between 6.0 and 6.3... But you're looking good and going strong! Good luck the rest of the way!