Welcome from Tennessee where I am a BI consultant. As an engineer with a business degree, I only started using Tableau 5 years ago, and then only at the request of a client. Since that point, I have become a 5-time Tableau Ambassador and a Zen Master.
I started this site 2 years ago to help new and intermediate Tableau users expand their skills. The site is based on my experience on the Community Forums and includes answers to FAQs, examples on "How-to" use Tableau functions, and specific "Use Cases" that have repeatedly been the subject of questions posted by users just like you.
I came to Tableau with a background in Excel and a bit of Access, but no SQL or large database experience. At first, I found Tableau not at all like Excel and I was confused. I need to relate to Tableau in terms colored by my engineering training. The Zero to Zen series (see Zero to Zen and 5 Stops Along the Way ) follows that journey and the 5 basic concepts I needed to understand before I was comfortable using Tableau.
I've attempted to write this blog to help you understand how Tableau works "under the hood" as you do your analysis and create your viz