A few clicks required to sign up with Google account, or you can register using e-mail. Figma is free!
Figma works under Windows, Mac or directly in your browser. And it works well with .Sketch files
Once you've purchased any of Setproduct item, you have to simply drop it into Figma workflow
Then just press Alt+2 or click on 'Components' tab at the left bottom of the screen. You now good to go!
How to quickstart?
It's easy to migrate from Sketch or Photoshop to start using Mobile Design System in Figma