get on like a house on fire
strike up
cotton
out of the chute
ring up the curtain
début
get together
begin
hit the ground running
clean slate
snap to it
straight out of the chute
get on with
inchoate
pitch in
fly out of the traps
from the word go
reboot
from the get-go
off
keep in with
make someone's acquaintance
get on
instantial
friendly
outsetting
cut one's teeth
no time to lose
kick start
plunge in
hit it off
hit it up
get a jump on
running start
steal a march
get to know
exordium
astart
flying start
immediacy
revirginate
repartner
in the blink of an eye
step to
off the bat
to begin with
off the rip
in the twinkling of an eye
click
beginner