Down the SEO rabbit hole

I finally have my own website - http://www.abbyhorowitzdesigns.com. It's very exciting and
daunting at the same time. I've uploaded 71 pieces so far but working on the SEO - Search Engine Optimization is proving not so easy. I must have spent 12 hours working on it yesterday. And after adding all the meta tags etc., the program shows that I have lots of errors. Spent more time correcting the "errors" and the program still says I have the same ones...UGH! Now to call GoDaddy and see what's up. Have to correct all of this and then on to registering and authenticating my site with the search engines. Why why why?????????? Wish me luck!