10/12/2020
Don't buy a 3D printer and then study cad.
Start here:
https://www.tinkercad.com
https://www.freecadweb.org
https://www.thingiverse.com
And if you learn cad, then buy a printer.
Otherwise you may end up with an expensive
dust collector.
The london library at City plaza has a service that will print your things, or you can find a friend with a 3D printer, or find a maker space
in your area.
Download files and build them with your 3D printer, laser cutter, or CNC. Thingiverse is a universe of things.