Love it! Thank you.

I don't think you can go wrong with a large timber door. The colour should contrast with the granite nicely and will even help soften all the colder surfaces. Have you seen any doors you like? https://www.houzz.com.au/products/front-doors-prbr0-br~t_10816

Is it for yourself or guests? If it is for yourself, I'd store the shoes nearby (i.e. in the laundry if that's near the front door) as that entry is stunning and I think any furniture would take away from its beautiful simplicity. If it's for guests, then I'd consider getting a small stool and basket / box for when guests come over. Something really simple, but convenient for them to remove their shoes and pop them in the basket / box until they leave.

Side lights for sure and a straight door like To find and design pictured but I'd use clear glass, because the door is recessed which creates the privacy. Paint it white and at the same time paint the balustrade white to feature it again as was the idea when it was designed and return the front patio to red which I guess would be the original colour. Changing these great houses from original and think they look better is like getting an original XP falcon and putting a spoiler on the back because a spoiler looks good on a Porsche.