Where to begin?

If someone asks where do I start? Where do I begin? There is so very much to learn and understand. I think back to when I began. I first learned of where it begins...the health of the intestinal tract. We can eat well, but are we absorbing what we ingest? Are the microbes in the intestines good or bad bacteria? Probiotics, or 'good bacteria' have to inhibit our digestive tract. More tomorrow.