Maybe someone could write a tutorial with basic pointers for potential wall builders?
There are so many things - the best way is to find the real thing (or a detailed photo) and study it.
i.e. take a sketch pad, draw how the doors and windows openings work. Measure it. Draw the bricks.
Lots of construction methods change over the years, and there are things that you won't notice until you look closely (like what stops the bricks above a window falling down)
You will see how few weird shaped bricks or blocks their are - they are nearly all rectangles.
Look at windows with curved tops (arches) and see how they are built.
Look at the brick bonds
Count the whole bricks between window openings, they are normally positioned so the brickies doesn't need to have odd length bricks (just full or 1/2 normally)
Look where the window frame is placed in the wall. (in the UK it is often between the outside bricks, in Germany it is often behind the outside layer of bricks so 100mm from the front surface)
It is structurally strongest to have windows above one another, with piers to support weight at corners etc.
You can build almost anything in any way today, it just costs so much to do fancy cuts and use non standard sizes people don't do it.