ok there are multiple ways to trim a plant and it is a art form for sure, so if you are not comfortable in doing so i dont recommend doing it, now if you do i always suggest lollipopping/skirting the lower portion of the plant for more than one reason, 1) overgrown lowers are a breeding ground for mold and pests because it is very moist and very low airflow 2) it will consentrate the plants energy on the upper more favorable main colas. that being said here are a few pics i took today from the start of the lollipopping at week 1 of flower.
first pic is of the subject, notice all the lower branching!
these are the branches i attack (lower little thin branches that will create popcorn nugs)
notice i have the branch and the immediate leaf in the shears, i cut both off.
the branch i hacked off
after the trim is complete
notice the four main heads i want to concentrate on! these are all i really want and will continue trimming until the colas start to form
the pile of cuttings
notice this plants lower bushiness, the leaf has literally made a fortress to block light and air to get in, yuck a breeding ground for sure.
this is after the trim
and that is pretty much it.
also i continue this process until the plant has completed its stretch (usually through week 3-4 of flower) each week taking a little more at a time as the plants grow vertically.