Follow these steps to publish a dashboard in Power BI:
Step 1: Select File > Publish > Publish to Power BI or select Publish directly on the ribbon.
Step 2: Sign in to Power BI.
Step 3: Select the destination
After publishing is completed you will receive a link to your dashboard. Click the link to open the dashboard in your Power BI site.
If you are interested to learn Power BI from experienced instructors, you can enroll in this Power BI Certification course by Intellipaat that provides Instructor-led training, hands-on projects, and certification.
Also, watch this video on Power BI: