DRAWING COMMISSIONS!! ^_^

Soon im going to finally get a bank account so i can start doing drawing commissions, i wanted to ask if anyone had any advice or tips on this! >< 

Im only 15 but i wanted to start doing commissions to make money, and be independent from my parents! My father usually guilts me after i ask for anything or he will constantly make remarks how I'm good for nothing and wasting money on games or things i want. So i wanted to earn my own money so i could stop feeling guilty. I also want to finally get back into drawing again and feel genuinely motivated to draw for the  first time in years. ^_^