Hi,
Was hoping I could get some guidance on an interesting project I'm playing with at the moment. Any idea / hints / tips links or tutorial would be appreciated

Background
I've build a simple cnc etch-a-sketch draw-bot (mostly as an exercise to amuse the little fella).
Works on basic x / y gcode commands but doesn't have a pen lift (z axis). The software design software (Inkscape) I've been trying seems to be designed with etching machines or lasers (that can be lifted or stopped) in mind.
This obviously is not really appropriate for my applications as the "tool transits" leave marks on the image.
It works well enough for basic draw a square / line circle etc but falls down on anything more complex eg render an image, logo, text etc.

Question
I'm looking for advice on software photo/vector/image --> gCode software suitable for continuous drawing (no pen lift)
(Or perhaps an alternative approach from the Arduino firmware through to software image generation)

Research
Hence my research lead me to polargraph's / draw bots etc.
Also I came across Scott-Cooper & Drawbot_image_to_gcode_v2 https://github.com/Scott-Cooper/Drawbot_image_to_gcode_v2 and it occurred to me that this may generate a more suitable gcode stream but I was having trouble getting to the bottom of the software stack / setup of this. (Any tutorials please?)
Perhaps someone could correct me if I'm wrong but looks like this is an add-on tied to "processing.org" software, but I'm again having trouble finding how this fits with drawbots or how it is used? (processing 101 guide perhaps?)

Current Setup:
Software
GRBL - arduino based cnc firmware & gcode interpritre
Universal GCode Sender - for streaming Gcode commands
Inkscape & inkscape-unicorn add on - for generating gcodes

Hardware
2 x Nema17 steppers
2 x Couplers
1 x Motor Mount
1 x 24V power supply
1 x Arduino Uno
1 x protoneer cnc shield v3
1 x Mac laptop for Streaming Gcode to the board