Questions About Past Life Regression

hi all, i'm not sure why, but i've been putting off doing a past life regression, even though i've been really interested in knowing about my past lives for a fairly long time. i'm thinking about doing the Brian Weiss regression on youtube.

Is there anything I should do to prepare for it beforehand? Does anyone have advice, having done it? Did you find it easy to remember what you saw? Has anyone done it twice and seen the same thing?