Welcome to the farm
Sure youβll meet lots of folk ready to help and have a laugh with
Iβm in the uk witch isnβt legal either sadly.
I know you gotta be discreet and not have the plant in the garden lapping up the sun however yours definitely needs more light you wonβt get much back the way it is and itβs a risk that you want to benefit well from.
Just trying to think of a way to help you yeild more the black thing wonβt reflect light can you do something to make it white.
If you daily bend the top down or tie them it will help it stop stretching. If you tie it you may want to untie it every other day and let it grow upwards again it forces the stem to thicken up just basic lst ( low stress treatment ) will help.
Good luck and enjoy the adventure