I wonder if adding top dressing of worm castings t...

No need to make your first grow more complicated than it needs to be. I would recommend making your grow as conventional as possible. Focus on finding the correct lighting levels, creating a full canopy before switching to flower and not killing your plants by adding too many nutrients. Generally speaking, there are enough variables balancing these components, especially in an LED/coco grow, that adding another won't benefit you much if at all. Growing is fun but most of us screw up many times before we get it right so patience and astute observation is key. Good luck.