awkward and uncomfortable with other people, especially because young and without experience (Cambridge)
shy or uncomfortable when dealing with people and often saying or doing the wrong thing (Oxford)
بے سلیقہ بے تکا
She had grown from a gauche teenager to a self-assured young woman.(Cambridge)
It was gauche to invite them just two days before the party. (Cambridge)
a gauche schoolgirl
Gauche teenagers
awkward
inelegant
elegant
graceful
gaucheness
gaucherie