knows the ins and outs (verb) know the ropes: understand the particulars of a situation
Sinonime: abashed, backward, blushful, blushing, chary,
confused, constrained, coy,
demure, diffident,
embarrassed,
humble, modest,
nervous, overmodest, recoiling,
reserved,
reticent, retiring,
self-conscious, self-effacing, shamefaced,
sheepish, shrinking,
silent, timid,
timorous, unassertive, verecund
Antonime: confident, unabashed, unshy