Even if your website is online, it does not mean that Google has indexed it already. It can take time for Google bots to crawl millions of sites each day and index your newly built portfolio.
The first step is to verify if your website is indexed by Google:
Open your web browser and type in the address bar: "site:URL-of-your-site" (ex: site:www.portfoliobox.net). If at least one result shows up, it means Google has added your site to its index. Congratulations! If not, you can accelerate the process by submitting your URL to Google or verifying the ownership of your site with Google Search Console.
However, your site being indexed does not mean it will rank first in search results. You also need to work on the optimisation of your website.