learnskill command

learnskill'Skill ID'

Command effect: This command will make Geralt learn the skill with the specified skill ID (or talent code). Enter the command again to increase your skill level in that skill. A list of all skill IDs is at gamesref.com/games/witcher-3/skills.
Example: learnskill('sword_s3')
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How to enter console commands

You will need to enable the console in order to enter commands. To do so, go to the folder The Witcher 3 Wild Hunt / bin / config / base / general.ini. Open the general.ini file with Notepad. Under [General], add DBGConsoleOn=true. Save and exit the file.

Now you can enter commands in the game. Open the console in the game by pressing the ~/~ button.