Bathroom planning new construction idea generation

I am currently planning my new build and have now reached the bathroom planning stage for the main bathroom and need some ideas or help. Attached is the rough floor plan. The windows can still be moved without any problems, but unfortunately not the door. It is important that no installations are placed in the corner of walls C & D, as there must be the option to later break through a door in the corner of wall C. Another wish is a double sink, and what I also like very much is a T-wall behind which the shower and the toilet are located. Otherwise, I am open to ideas. Thank you very much in advance :)

Google "Königskram fugenloses Badezimmer". They have quite similar dimensions and, in my opinion, are very well done

With or without a bathtub?
Which orientation?
What view?
Is privacy screen required?
Consideration of location and neighboring rooms?

A T on the short side creates a headwall of 1.25 m with a narrow, clearly non-accessible passage of 65 cm. For that, you need a compact double sink. Toilet on the window side. The T-piece does not have to be centered; feel free to give the shower a bit more space and build the T-wall space-savingly around the cistern or use a pressure flush to avoid wasting more space. Make the T-wall only 2.2 m high to allow some air circulation and make the construction appear less massive in the room. To allow light into the shower area, you can make the rest of the wall from cistern height out of glass. This even provides a practical shelf area on both the toilet and shower sides. For a bathtub, the corner C-wall toward the exterior wall is suitable. The installation does not have to run through the C-wall; if a door is installed, a new bathtub will have to be fitted as well. Planning a bit more installation at construction does not cost more and helps later during remodeling. So, you can provisionally provide a water inlet and outlet in the B-wall and not use it from the start.

Thank you very much for the really great feedback. There should definitely be a bathtub included. Both windows will be fitted with privacy glass. It doesn't necessarily have to be a T-wall, I liked the idea in principle but if my room is simply too narrow for it, it doesn't have to be forced in at all costs. I thought something like this would be okay as well. The toilet should be somewhat separated.

Please provide the floor plan, at least as a draft. The sill heights for the 2? windows are also important as well as possibilities for the door.

Attached is the floor plan of the upper floor. Attention... Room "Kind 2" will become a bathroom

Unfortunately, I do not know the parapet height