Tinkercad is fine. Obviously F360 is better, and FreeCAD is the best FOSS alternative, but if all you need is a shape that's the right dimensions, Tinkercad will do you right
The drawing is fine but the circuit area is garbage. Random errors in arduino, slow emulation, bugs that delete everything you've worked on, I'd just rather use sticks and bash them to one another till thsy light up.
Also Freecad is good but takes a bit to get used to it.