Well, don't forget, I'm a noob, still. Also, not everyone gives autos nighttime. I do, but it's an ongoing debate, I think, whether it's necessary with autos or not. I switch from 24/0 to 18/6 at week 3/4. I do this to keep temps lower during daytime and a bit higher during nighttime so they stay at a more constant temperature. Less fluctuations is good imo.
It saves on the electricity bill.
And, even though this hasn't been properly proven, if it is true that giving autoflowers nighttime makes them healthier in some way, as some growers believe, that's just a bonus.
Downside might be that yields is less, because above theory isn't right. But at 18/6 yield is enough for me, so.
Only thing with doing LST, is: don't try to bend new shoots! Bend them from a lower point of the branch where it's still bendable and not woody. First touch some branches and carefully feel when to stop bending. When in doubt to go any further, stop.
Sounds scary, but you'll get the hang of it. It's fun to do and is sure to up your yield significantly. Maybe not your first go, but hey, you're now growing too learn as well, right?
If you mess up, I'll send you a seed!