...Really SUPER curious AND nervous about 'trace.' In the videos, people's batter all looks so liquidy. Nervous about pulling the trigger at the right time -- not too soon or too late. If I'm not going to swirl, is it better to keep stirring to a less-thin trace? What does the 'right' trace feel like? - pudding, or something thinner?
Meena, newbie made an excellent video on stick blending to emulsion:
https://www.soapmakingforum.com/threads/stickblending-to-emulsion.60618/
Pouring anytime after this will be fine. Because you aren't swirling or doing anything fancy, you may as well stir the batter (and occasionally give it a burst with the stickblender, if you like) to see how it thickens up.
When it leaves a trail on the top if you lift your spatula out, or you can see a line left behind when you stir the batter, that's "trace".
It will keep on thickening, and you can check if it is thick enough to coat the back of a spatula (can't use the old wooden spoon - they dissolve , as if you are cooking (that's a good point to pour for quite a lot of recipes), but you can go as thick as pudding or cake batter if you like.
For a first go, it would be interesting to watch it thicken up as you stir it - as long as it is pourable, it will be fine