The best place to start is to read Moz.com's Beginner's guide to SEO:
https://moz.com/beginners-guide-to-seo then see what you can apply to your situation.
Also, remember that Google tailors it's search results to what it thinks you like to see, especially if you are logged in to your Google account when searching, so while you might be second when you search, when another person searches your page may not be second in the results.
