Just spent 45 minutes installing STi SS kit on 02 WRX.
Tools you need:
10, 12mm sockets and ratchet(s)
pair of gloves (optional)
jack stand and lift
Twist shift knob in counter clock wise to remove it:
Lift up the shifter console. Be sure not to lose holding clips.
Remove 4 10mm bolts that holds plate.
Two 12mm bolts circled in RED must be removed.
There are two additional bolts that must be removed. Only one shown here: