Learning insite scared to change settings myself

[rraccerr]

I am following Rawze advice to learn Cummins insite. Without hooking it up to ecm I can do certain things, but I need to hook it up to ecm to look at work order changes and to change To the proper mandate recommendations. Scared I might #**#*$=#= it up. Is there a way to be hooked up to the ecm and change it using the simulator. I been reading all the glossary but it is only explains whaat happens if you touch certain buttons. It does not show how. Hope I explained this right
Educating myseLf