It is much harder to trim after the plant is drying. As you noticed the leaves dry up and wrap around the buds and are much harder to remove. At harvest cut the plant up into the separate branches and remove any fan leaves at this time. Hang and dry for 3-7 days depending on the humidity in your area. When the branches are brittle and break, not rubbery and bendable, trim the small leaves out of the buds ( this can be done at the initial hanging when the fan leaves are removed also). Remove the buds from the stems and put into glass jars and open once a day for a couple of weeks to remove any excess moisture left in the buds. Store in cool dark place.
When drying on the stem also use the coolest and darkest place available. Never do the drying in plastic bags, wet plant material in plastic will turn to mold. The buds are useable after 5-7 days drying but the best is produced in the curing process in the jars.