Yes, you can start adding articles. As few others said, before start adding content to your new site, you need to do keyword research to find out which words your audience is using when they?re searching for your products or services.
And high Click Through Rate (CTR), it directly appreciated by search engine. The CTR is important metric for search engine to evaluate quality of SERP, and it leads to getting natural links. By writing demanded original contents for search engine users, you can get a few access from it, at first. Making excellent content is start line of step by step seo.