How to start.... Dashboard in a web page

Hello,

in my job they want to include some awesome graphics of our data (non-public data), so they decided to start with Power BI dashboards, but.... I really have no idea how to start! I mean, I need to visualize those dashboards from our website, but I don't know how to do it, I've read some tutorials, videos, examples, etc. but still nothing :(

What I need to do? Do I need being registered somewhere? It's free? .... I only know I know nothing :)

Best regards and thanks, M. Sanchez.