Thank you for the hint concerning UMG. I think I will try that as well.
I currently have a Coherent UI trial licence. That way I can probably find out what works best for me. Since I don’t know anything about JavaScript and html the Coherent UI start was a little bumpy for me but there are probably some helpful tools out there.
I also worked a little on my HUD concept. This HUD is not functional yet. It consists simply of two textures on planes in front of the camera that do nothing but moving with the camera but the idea should become clear:
I plan to make the HUD screens rotatable around the screen’s Y-axis to control how much of the screen is occupied by the HUD. The left side is supposed to give feedback on the surroundings. The right side displays the player ship’s status.
The top of the screen will get something like 3D radar screen thing working as a mini map. The edges of the screen will probably get some kind of sci-fi projector things that look like projecting the HUD planes on the screen.