Gregs High Performance SEO??

Hey Guys
I am new to WordPress. I currently own a small business, and I want extra income from a blog in the related industry/hobby.

I am looking for the best way to become SEO. I installed Gregs High Performance SEO, and I am leaving all the settings default.

My question is, is my website now SEO? If I start posting my link in other areas of the internet to get it spread out, will I eventually be on google? What are the best steps to take AFTER using this plugin?

I know there are plenty of articles on the internet about SEO. I have read them and am continuing to read them. What I need help with is what to do AFTER installing this plugin.

Thank you!