I have a few questions

  1. Plugins such as HTML to Figma can help.
  2. You can’t, Figma is not a website builder. Some plugins try to do it but I haven’t seen great results yet because simply Figma doesn’t have enough data.
  3. This isn’t possible yet. But soon it will be.
  4. This isn’t possible yet but this feature is in active development. Many people use normal and beta desktop app for different accounts.
  5. Yes, it’s perfectly safe. Even if something goes wrong, you can always restore the previous version.