Use the K1C profile supplied by the current Creality Print release or an official K1C definition in your chosen slicer. Do not adapt a K1 Max profile by changing only bed size.
Confirm the exact K1C revision, installed nozzle and plate. Start with the generic material profile for the polymer. Maximum travel speed is not a sensible first wall speed; hotend flow and cooling still set the useful limit.
Inspect start code for homing and automatic leveling behavior, then use Preview to check the first layer, purge position and unsupported islands. Keep the original system profile untouched and duplicate it for experiments.
Send a short test through the same LAN or USB route you plan to use later. A profile is ready when it reproduces a known first layer without unexpected travel or skipped preparation.
Checking Preview for unsupported islands is worth taking further — the general supports guide explains when a model actually needs them and how to remove them cleanly afterward. A profile is only useful once the right material is loaded and purged; see the K1C filament loading guide for the extruder lock and purge sequence this printer expects.