Making her WNCL debut in 2012 at the age of 15, she is the youngest person to ever represent the state of South Australia in senior cricket.

[1] Inspired by Australian Test cricketer Shane Warne, Wellington taught herself to bowl leg spin in her backyard.

[3] She proved her worth early in her state career, just a fortnight after her debut, helping South Australia to a win over Tasmania.

[10] Her form continued to improve in the 2016–17 season and she was South Australia's leading run-scorer in grade cricket with 325 runs at an average of 81.25,[11] prompting selection in international matches for the first time.

[14] On 24 November 2021, in the Eliminator match of the 2021–22 Women's Big Bash League season, Wellington took the best figures in the history of the WBBL, with five for eight from her four overs.

[21] With her very first ball in international cricket she took the wicket of South African captain Mignon du Preez, going on to finish the innings with figures of 1/35.

[31][32] In January 2022, Wellington was named in Australia's A squad for their series against England A, with the matches being played alongside the Women's Ashes.