shallow end
in at the deep end
deep end
run an errand
foray
byway
subexpert
ankle-biter
dequalification
fellowship
inexperience
drop in the bucket
it's not what you know but who you know
microcontext
unschooled
inexpertise
outskilled
find out the hard way
miniaturistic
vocational
up a gum tree
experiencelessness
nicety
stupidity
tough sledding
easy
cough and a spit
unchallenged
inadequacy
disorganized
booger
inexpertness
circumstantial
amateur hour
loose end
amateurishness
backward
nonexperience
immanent
easiness
dig a hole for oneself
bad boy
raw
hash out
land mine
secondarily
underchallenge
swot up on
microskill
nontalent
new
enmesh
somewhat
underinstruct
micromilieu
secondary
spinous
bumbling
experienceless
stroke of work
trifle
unseasoned
pons asinorum
microdegree
academic question
send a boy to do a man's job
triviality
micropractice
small beer
trivia
waltz
toolishness
mountain
scoped
subcritical
amateur
one's turn in the barrel
fight fires
fiddling
unexperienced
enterprise
deficient
semisupervision
noviceship
microdecision
queer someone's pitch
technicality
belated
niggling
little
careerlessness
footling
inexpert
amateurish
unskilled
lilliputian
pseudodiscipline
entry-level