You can make hash from fresh bud and smoke it right away but you really need to use the Dry Ice method.
The Dry Ice freezes the trichomes and you shake them through the screen of your 70 or 100 micron bag.
Get a large container (coffee can or similar), put buds/trim into can with smashed Dry Ice.
Tape or securely fix your bag screen in place over the open end on the can.
Shake the shit out of the can for 15 minutes over a sheet of glass or a mirror.
Collect the powder, and either compress into blocks or just smoke it as powdered hash.