Hi Bruno thanks for posting in the Lucid Community!
Yes we offer licenses for individual users - you can learn more about the differences between our plan types in this Lucidchart Plans article and Lucidspark Plans article from the Lucid Help Center.
Regarding Figma - Lucid doesn't currently an integration for exporting Lucidchart diagrams or Lucidspark boards to Figma. However you might find our Embedded Link functionality in Lucidspark useful - this allows you to directly embed your Figma files into your Lucidspark board helping to centralize project information and provide additional context. Learn more about this here!
You can import Draw.io files by following the directions in this Help Center article.
If you'd like to share additional details about your use case or what would make these integrations beneficial we'd love to hear more in this thread or our Product Feedback section.
Hope this is helpful! Please let me know if you have additional questions.