What slicer are you using Orca or Studio ?
I’m not at my office and I use Orca slicer so I downloaded studio on my laptop for now and I’m going to do some basic petg speed settings to get you started.
Ocra slicer has more settings and calibration tools.
Do the flow dynamics calibration and the flow ratio should be around 0.95 to 0.98 range
Studio Slicer PETG settings just test on basic petg for now.
.
.
.
.
.
.
You also want a Z offsets with these filaments