recording

This is for voiceover. I was given advice that while recording it's just as well not to use any headphones whilst recording. True? And for editing/processing/mastering studio monitors are best but if without those, use open-back headphones instead. And that semi-open won't do. Do you all agree?

Hi! I want to record instagram videos while playing guitar. I am using Bias FX2, Logic Pro x, a scarlett 2i2 and a iPhone 8. My goal is to record the guitarsound straight in to my ihpone, while blendning in some room audio from the built in mac mic, and do it all in one take, without editing. I...