How do I manage my 20k salary?

19M here, got my first job this year. How do i manage my 20k? where do i invest? What should i do to make sure i have and emergency fund ready in future or save some money for future? Like use it for my higher studies, get a bike..stuff like that, I don't usually spend a lot outside, mostly food and travel which take around 6k - 7k approx even less ig, i don't have to pay any bills and stuff my parents take care of all that. I want to be financially strong in the future. Any suggestions? And also what should i gift my mom, dad and lil bro?