There are many free and paid SEO & link building online courses to learn from experts at home
Write articles, share them through social media and get shared your content around the world for better traffic
As SEO is evolving these days I would say online marketing techniques and strategies are changing daily.
What works today doesn't mean it will be effective tomorrow related to SEO industry.
Do not concentrate only for link building try to implement ' growth hacking ' techniques into your marketing plan.