Should i trim the shoots below the main cola?
Such a broad question with many variables.
I do like defoliation, but need to be thoughtful about it when doing so. You can shape your plant however you’d like.
Better light penetration
Focused growth leading to more dense buds and less of those fluffy scrap buds from lower sucker branches.
Depends on what you want out of your plant! Looking good!
Trim any thing that is not near the end of branch or is not getting enough light intensity to make it get dense. Scrogging is an LST method of evening out the canopy to eliminate this process, check it out!