J-Milla started releasing rap videos on social media when he was around 18, which built a large following. In 2020, J-Milla pledged to donate the earnings from his single "Unlock the System" to the family of
Kumanjayi Walker, an Aboriginal man who was killed during an arrest attempt. The song was strongly supported by the
ABC radio station
Triple J. In November 2020, he performed at the
TREATY festival as part of
NAIDOC Week at
Tandanya in Adelaide, along with
Dem Mob,
MLRN x RKM, and shared the
MC duties with actor
Natasha Wanganeen. J-Milla was selected for
TikTok's online music festival that year. He performed on the closing day of the
Adelaide Festival in March 2021, at an event called "Hip Hop Finale", along with
Ziggy Ramo,
JK-47 and
Jimblah. On Saturday 16 November 2024 J-Milla will be performing at the After Race Concert of the
Adelaide 500 motor racing event in Adelaide. It will be the biggest show so far for him, and he intends to showcase unreleased work. Others performing that night are
Crowded House and
Meg Mac. Some of his music deals with problems affecting
Aboriginal Australians, such as
intergenerational trauma and
reconciliation. ==Other activities==