I think what's always been interesting to me than the science and the criminality with this job is what happens to your persona, your disposition, after day in and day out dealing with life and death.
Cook ingredients that you are used to cooking by other techniques, such as fish, chicken, or hamburgers. In other words be comfortable with the ingredients you are using.
Observe which side resorts to the most vociferous name-calling and you are likely to have identified the side with the weaker argument and they know it.

