I do consider myself a low poly character artist.
https://www.youtube.com/watch?v=uwXgWdZpySc&list=PLCuz_EkqNkJwBCw019CpTdoqPcdJcoHxc
I recorded a timelapse of my workflow from concept up to rendering the animation.
My advice if you have 2D skills would be to draw the reference as pixel art.
It really helps if you want to make low poly and you're a newbie.
If you lack 2D skills, my advice is to try to copy a character ortho reference (google things like character blueprints, or pirate a T posed model from a videogame ripped model or a Vroid generated model) and then try to draw the topology using Krita polygon tools, try to redraw the model similar to low poly using the line and square tools.
It really simplify your mental task if you can draw the topology first in Krita.
If you can't even draw your reference, try to like get an N64 model from a game like mario 64, and then put on Edit mode, take a screenshot and then use that in front and side view (literally just trace it) as reference on Krita.