My girlfriend and I are very new to all of this and we want to take things quite slowly to start with, we want to start by my girlfriend exposing herself a little and maybe the two of us being watched while we have a little fun before we think about involving another person. What is the best way to do this without getting peoples hopes up if we're not going to go all the way (and without getting arrested

Is there an etiquette to follow? etc.
Any advice would be appreciated