3D

Blender Shortcuts

Object Mode

Alt-D- Duplicate Linked

Shift R - Repeat last command? (Good to duplicate multiple)

M - Move objects (to collection)

Face Mode

I - Inset face E, S - Extrude and scale

Edge Mode

CTRL - R - Add edge loop

Graphic styles

Unlit, cartoon shader

3D model by Sorin Covor

Tips: Set World Surface color to blue or similar, strength > 1 to stop harsh dark shadows. Use area lights. Use Toon BDSF Shader.

Other 3D softwares

Womp - for use in browser

https://www.meshlab.net/

https://www.meshmixer.com/