Social media should be your priority when starting out. Create social media and post from them, or generate links from them to your website. Connect your website to those social media networks. Once social media starts gaining authority, your website will, too.
Also, try posting on forums or sites related to your niche and include a few links with a good anchor. (Post useful information to get forum users to visit your website, even if it's just for informational purposes.)
If you need more information, let me know.