This is a great way to present your teachings while remaining in the shadow. Your technology should be able to generate great animation movies. Employ animators in human colony and broadcast animation movies via YouTube. This will work great.
At some point the human collective subconscious will accept the aliens as reality. At this point the panic will no longer will be a factor. In other words, there is a way to introduce aliens to the humans via art which will eliminate the danger of panic. This is already happening without your help. If you help it will happen way faster and more positively. With your technologies you could outcompete MIC which is poor in creativity and artistic talent. This is how Beatles and hippies transformed the world in 1960s and not it can be done again.
MIC = military-industrial complex