Hello...
I think you are going to have to find a way that works for you to overcome this fear of Electro-stim, it is absolutely vital for pain relief (stagantion).
Perhaps you can contact the school you went to and ask the Instructor to clarify some things for you.
I was taught that you put the black clip nearest to the area of pain, and the red clip further down the channel to lead the stagnation out. Don't cross over a joint (like a knee or elbow) with the red clip because you will not effectively lead the pain past the joint.
There are areas of the body that are contraindicated to use electrostim, I am concerned that not enough knowledge could cause you to make errors.
I was told by someone at school that 7.5 is a universal healing frequency, so I often use that. I start out on LOW pulsating and turn my dial up very slowly until the patient can feel it and then turn it up just a tad higher.
Low for 15 mins, then high for the last 5. But this is my unit, I have no idea what yours is...ask a classmate or an experienced Acupuncturist to help you. But it is a VERY good tool to have.
Sincerely,
Liz