Welcome to the alcantara family!
Sadly, that section of the door does not come off, although you can do it in one piece.
It depends how brave you are. You can cut into the panel, following the line at the bottom and tuck in the material there. That's what I did, but I was covering the whole door.
You will be able to butt the material underneath the wood trim piece. As for colour, get some samples in and see what looks best.
Tinted tails - Custom intake with mushroom filter - Superchips performance tuned - 20" SRT reps - Alcantara headliner - Magnaflow exhaust - Roush performance tips - LED conversion - Carbon Fibre/Alcantara interior - 20% tint -Bright Jeep pedals - Matte black viper stripes - Gauge pod - Gen 3 halo projectors & HID's - Airbrushed engine bay - Mesh grille - Snakeskin green calipers and accents(inspired by DAVY27)