Don't think of precepts like most people think of the Ten Commandments.
As you progress along your path you will be a moral person because you will have uprooted the causes of immorality.
Think of it like a garden. The precepts are not a sign post with the words "absolutely no weeds allowed". Viewing it as such will lead to you attacking the weeds with a pair of scissors, wondering why they keep coming back. What you ought to do, is uproot the weeds whilst you cultivate the soil, and plant seeds that will flourish in place of the weeds. Approach the precepts like a gardener who is aware that weeds are undesirable, but knows how to get rid of them properly.
Following rules blindly will lead to confusion, and worry. You will forever be thinking "uh oh what if I just broke a precept" or "does so and so violate the precepts". So far as I am concerned they aren't mean to be taken on in that fashion, but rather like the knowledge that weeds are undesirable. A rough guide for you to work on whilst you develop the means to uproot negative behaviour.
Focus on developing kindness, compassion, wisdom, and concentration, follow the precepts as best you can without worrying too much. We all have moments where we do or say unwholesome things, forgive yourself and work on the roots instead of worrying about each little weed.
"For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring."