I'll say somethign that you will completely ignore because it's more about trying something new at this stage for you, lol, and that's a powerful motivator.
You do it when it is useful. This plant is a bit too small to start. Unless you want a near-manifold type structure underneath, but then that borderlines on more than just LST. Usually i want more than just some mostly undeveloped axillary buds before i bend it over.
If height is an ultimate concern, you'll want to bend it over before it becomes rigid/woody. Anyting below the bend is better off if you just cut it off. Rigidity doesn't happen overnight, you'll feel when it starts to stiffen.. wow, this is wose than listening to pro sports announcers talking about penetration and shit, eh? Anyway, if height is a major concern, you want to start it growing horizontally earlier and put in a littl emore effort controlling dominance of the early growth so that your apical meristem (primary trunk) contines to elongate to a proper size to fill its area. More likely to stall it if you do it with a young plant.
More extreme LST can cause some initially odd leaf growth or stall the plant in extreme cases, but more often it just looks like it slowed down but is really redistributing majority of resoureces from one growth tip to many.
can either bend them down between the axial growth or favor one side and prune off any downward facing growth. After that it's just udnerstanding cause and effect of apical dominance.. simply - the higest growth node will take the majority of resources. If one starts to out gain others, temporarily bend or tie it down until others catch up. this is also why i say anything below the first bend will be near impossible to grow good bud on in comparison to branches growing from above the intitial bend. Sometimes topping is useful too. It'll initially slow down that particular branch for a few days, and if you need to fill a bit more space in that area, kills 2 birds with one stone... mix n match when it works well. The vascular tissue (stems and stuff) running to buds is better evenly distributed. you don't want to top 1 branch 6 times and the rest none and expect the 12 tops to be equivalent to those that have a primare connection to the main trunk. sometimes it's just convenient to split an extra time, but don't go bonkers topping any one primary/secondary branch more so than others.
Many of these techniques are more about why you do them than doing them to increase yield. Though anything that organizes and distributes things evenly will likely increase yield, you still have to consider any extra time and costs while doing so. Sometiems it's not about yield... height was mentioned.. maybe, you just want a greater proportion of better quality nugs by maximizing those areas of canopy and sacrificing elsewhere. so, it's hard to be militant about any of this stuff... if you see a reason to do it... do it. do it for fun early, but don't do it just to do it after the scrappy-doo period wears off. It is still beneficial to learn early even if not 100% necessary to do any particular technique.