I'm not an expert, but having good motivation (generating bodhicitta) is always a good thing and would not hurt one iota
. That way one is doing this activity for all parent sentient beings' benefit and happiness.
Picking up a book like 'The Dark Red Amulet' http://www.amazon.com/Dark-Red-Amulet-Instructions-Vajrakilaya/dp/1559393114
for afterward would not be a bad thing imo either.
"Things are not what they appear to be: nor are they otherwise." --Surangama Sutra
Phenomenon, vast as space, dharmata is your base, arising and falling like ocean tide cycles, why do i cling to your illusion of unceasing changlessness?