Search engines like Google can take 4-6 weeks or more to add new sites to their search results. WordPress.com sends updates to Google every time you update a post or page on your site, but we cannot control how your site is displayed in search results.
In theory, all you need to do is keep adding content to your site and the indexation will happen eventually. However, there are tips that we put together that can help you accelerate the process.
You can take a look at this link below and for more detailed information on what you need to do: