Looking for help!!!

Little sisters friend hopped on my Xbox and spent a lot of money on gun upgrades. He didn’t spend much as I didn’t have a lot to begin with but still he bought almost all the tints so I have basically no money, only 7k. What can I do as a lvl 7 to earn back a lot of money on gta online?

use glitches or grind missions i would recommend searching on youtube

I would also look for the answer to this question on YouTube
I think there has long been a fan who shot a video where everything is described.