With your PC/GPU you won’t really be able to run the game at a resolution high enough to make it look crisp. That requires a current high end GPU. Judging from the usual benchmark sites your GPU is slightly slower than a GTX1080, which I would consider minimum spec.
If you still want to try, follow the suggestion shown in the tutorial on start: set the graphics details to ‘low’ in the game options, then raise the ‘resolution quality’ option in the mod menu as far as your PC allows without tanking performance.
The HUD can be scaled on the image page of the menu. Without a high resolution that doesn’t really make sense though.