For simple parametric CAD, use a trial of Fusion360 or Solvespace. Then 3d printing it is as simple as slice and print using something like Cura or PrusaSlicer.

For simple parametric CAD, use a trial of Fusion360 or Solvespace. Then 3d printing it is as simple as slice and print using something like Cura or PrusaSlicer. Plenty of tutorials for those two.