Do I need to file taxes this year?

Hello, I turned 25 in 2020 so my mother can no longer claim me as dependent even though I still live with her. I have never worked as my mother wanted me to focus purely on my education. I graduated college in Dec 2019, however, due to the pandemic I am still living with with my mother and have been unemployed. I have recently started school again and have made a few sales selling some items totaling around $300 online. I am unsure if i need to file taxes for 2020, and I would appreciate any help and advice!! Thank you!