How to earn money and advertise with my henna?

[Opal]

I'm 17 and I'm very good at henna, every year at charity events I do henna and I did henna for people's weddings. People have told me I'm good and that they would pay me but I always said no its ok because then it was just for fun. Now I want to earn money from it...I don't want to hang a massive desperate sign on my parents house or on our street...any alternatives? how do I find customers? I'm really new to this does anyone have any ideas? And how much do you think I should charge per hand? Thankyou so much plz let me know any business success stories of your own!