Are there any training/teaching groups in Sydney for DataCAD 21?
I don't think there is any DataCAD training at all in the Sydney area.
There used to be a Sydney User Group with regular meetings. There are still DataCAD users in the Sydney area, but the user group hasn't met for quite a few years now.
There are some on-line training videos around if you do a search on youtube, but most of them are at least a few years old so not sure there would be anything specifically for DataCAD 21.
Sorry I can't be more helpful ... Your best option is to ask 'how-to' questions on this forum as there is generally somebody willing to address such questions.