spread one's wings

/S P R EH1 D W AH0 N EH0 S W IH0 NG Z/
verb
  1. 1

    To experiment in life; to find out what one is capable of.

Source: https://en.wiktionary.org/wiki/spread%20one's%20wings, https://en.wiktionary.org/wiki/try%20one's%20wings