IF you want to lag the clubhead on the takeaway, you have to decide whether you want left hand/left arm control or right hand/right arm. That's how I would do it, although there are other options (which I don't favor) such as just turning the shoulders while the arms/hands lag. Or even turning the hips while the hands/arms lag. Here we have the age old debate: body controlled pivot vs. hands controlled pivot.
I believe Bobby Jones kinda' did it with a lower body shift w/hip turn and he went inside sooner than I would advise & frankly was a bit off plane at that point (already). If I posted a swing like Jones, no doubt critics would be all over me telling me how terrible it is.
Anyway, left hand/left arm controlled lag is more commonly used in a swing, while right hand/right arm controlled lag is more commonly used in a hitting action. But, if you know what you're doing, you can reverse that and no one would even be able to tell.
YOU, however, would perhaps feel a bit schizophrenic (left controlled lag with a right powered hit; or perhaps you would like the duality).
However, these aren't absolutes & I'm just giving some generalities. My feeling is most hitters, don't like a takeaway lag, but I haven't interviewed "most" hitters...(who has?)
Hitters (and swingers), of course can, can pick the lag up during the downswing...this is a big subject as there are various types of lag...
Surely, Homer went into this; but (somewhat purposely) I'm not that familar with what he wrote; I preferred working on the subject myself & have my own views. In other words, I didn't want some else giving me "his" answers.
Still, I would advise having an expert as a guide so you don't waste YEARS. This area of the golf swing is a dismal swampland; as I said, extreme caution is warranted.
For example, one of the problems with takeaway lag action, it's hard to keep soft writst angles precise. But, if you can monitor well, it can work well. It is easiest to accomplish on pitches where the swings are shorter and the angles have less travel.