Welcome to the Community,
I hope it's ok to answer in English.
Which license you need for vSphere depends on your requirements, and the features you want/need.
This could be e.g. a free Hypervisor license, an Essentials (or Essentials Plus) Kit, or even higher - more expensive - license.
With paid licenses, ESXi is licensed per CPU socket, and vCenter Server (if you need it) is licensed per instance.
André
