All I can add to this is;
If you aren't comfortable doing this alone, having a helper to guide you is a good thing. A helper can see things that you can't, and stop you before it's too late.
This helper should be someone you don't sleep with, or one who loves you enough to know that just because you are speaking in a loud voice, doesn't mean you are angry, only that you wish to be heard
.
Having 2 or more helpers is....well........ just 2 or more helpers too many, not a good thing.