It'll help greatly to know what you want out of your end canopy.. don't just whimsically do things. HAve a goal at the end. This doesn't take any effort, and in fact will save you time and resources by comparison.
Figure out how many colas you want per plant to properly fill your area... These are generalizations, so don't worry about being off a bit if the math isn't perfect. You only need 2-3 colas per sq ft to maximize yield. In my experience the last couple years, 2.5-3 seems best for me, but i want to err having a little larf at the bottom so i know i didn't cut off anything worthwhile, plus i make use of that larfy stuff for bubble hash along with any leftovers from previous year.
Do things that fit your behaviours. There is no one-size-fits-all for this... do what works best for your context.
At that point you know how many branches to train for per plant and avoid over-crowding the canopy. Whether LST or topping or a combination of both get you there, it really doesn't matter. The less you prune off, the more efficient you were with your time and resources. You'll inevilty cut something off the bottom at minimum in most situations. Maybe a sea of green you could avoid that completely, too. I cut off growth below my first trellis. I try to time vertical growth to minimize any pruning after that point, but often have to take off 1-2 nodes worth of branches, even so. Remember, the plant will double in area after flip... fill a bit more than half the area, then simply shaping the growing branches outward will fully fill the area with leaves. No gaps.. end-to-end, but not crowded, either.
crowding leads to excess stretching and competition for light, wasted time and resources, increased risk of disease and smaller, more-distributed mass of buds. (the mass will be roughly the same, but more-distributed across more bud sites, if that makes more sense) It took me a couple years to appreciate the benefits of not crowding a canopy. I learned when i notices a more controlled canopy developed far better, then took a few more grows before i stubbornly adjusted my methods, lol.
plenty of guides on the basics of your options. One thing i see people neglect with lst is anchoring the base of the stem to the opposite side of where you bend the plant. This prevents it from lurching in that direction and tearing some fine roots as it does it. Typically a small issue with no long-term ramifications, but easy to avoid that damage, too. As the plant tries to correct it's statue, it'll pull itself through the soil upto a few inches in some cases, if not anchored.