Do you want the same design both sides? It all depends on the way the door will open as usually a door requires either a flat border or an L shape to close? Do you want the hinges visible or invisible. etc etcThese details are important. I would talk to a carpenter or woodsman first.https://www.houzz.com/magazine/know-your-house-interior-door-parts-and-styles-stsetivw-vs~13812351

i am not sure whether there is an app like this. If you can work in photoshop, you can take the texture and images from google and apply. Or you need to get an architect to design an elevation for you. We could also help you in that but it would be chargeable.

mostly Indians uses brown varnish paints for their main wooden doors....I even don't know why they didn't use other colors...even in my house doors are given brown color wooden texture...

Greetings From Dream Design, As per your Requirements we are suggestion you some changes -White color -where It is Grey -Dark Cream -Where Blue as it will highlight that area and also well goes with Bricks -and Trims take Dark cream -For Shutters you can also use Cream color So use the White and dark cream with combination as brick part is already dark If you need more help Pls mail us. Thanks Dream Design