First client, Ombré hair extensions help!

[Tanya1990]

Good morning guys , I completed my extension course last Tuesday and have my first model But She's asked me for ombré hair. Her hair is just past her shoulders and it's dark brown. She wants 20inch hair. What would you recommend i do? Do I apply 200 strands of one lighter colour? Or do I apply two shades of a lighter colour? And then dye the hair extensions pulling the dark down? I'm no hairdresser :/ I had looked at the ombré range from glamorous lengths but they don't offer 20" ☹ X Im not sure on using ombré hair and have no idea on any good brands! Your advice will be much appreciated. I attached two pics one is length the other is her actual color on top! Tanya xx