OnePlan has a point -- people are notoriously unaware when attention is elsewhere -- like getting to the front door. Laying pavers in a different color/pattern/size (pick an option that appeals to you) that will be the same level as the remaining pavers would give you the distinctive path. Shame to cover the pavers; can they be removed without destroying? Alternative that comes to mind is to create a barrier along that line. A railing mounting on the pavers either 3' high or 6' high -- pick your medium. metal posts w/railing. glass panels in a framwork. shoji screens. colorful curtains hung from above. A photo from further back, showing the front of the house would help suggestions.

Well for windows and doors you'd use gloss or satin finish paint in white and it shouldn't really be different to your white wall paint in colour , if you used the same shade of white from the same company.

I agree when you say sliding doors are difficult to maintain, especially when it comes to cleaning the tracks of the door. At first you may make the effort, but later you will so regret it. Hinged doors are easier to maintain. They are a blessing!

simple boring black door turned into attractive door