If you want to be expert in SEO than you have to spend min. 2 3 years with Google algorithm and work as Sr. SEO than you can be Expert of SEO
One tip I can suggest is that, when you are doing a method of link building, better research first how would you do it effectively. Many webmasters just heard about this method and learned it yet don't come up with results because of lack of knowledge how would this thing would work better. Example is social bookmarking/networking, most just keep posting and bookmarking without knowing or thinking how would people and SE find it..