Not much, no. I recall perfecting Cirno plenty of times before the first 1cc. Back then her first card gave me more trouble than all the others but now it's much easier to read.
On Perfect Freeze you search for places with 'not so many bullets' so you have less chances of bumping into one once they stop. Basically, look above your character to plan where you're going to be in advance. If you read the bullet in advance it's hard bumping into it, even if it freezes.
And no, The World is her second card I'm pretty sure.