I actually use PowerPoint and do drawings in a 1-inch=1-foot scale. It’s not 100% accurate since you can only go to 2 decimal places on measurements. And you can’t do 3-d models to move around. But it‘s good enough to play with different configurations and ideas.
I go to a page Setup and make the page a bit bigger than my project, up to about 40 by 40-inches/feet. Draw conduit as rectangles using whatever length x .06 . 3/4” conduit would actually be .0625 wide (1 inch in PowerPoint is 12 inches physically so 1divided by 12 is .0833333 per inch multiplied by .75 (3/4 inch) = .0625 in the drawing = 3/4” physically).