Well that's actually pretty easy! Thanks!Welcome!
Where you have installed the game in the folder renpy\common look for 00console.rpy > open with > notepad (unclick always use this app. to open .rpy files) , then in notepad Edit > Find and type config.console , keep click on find next until you find config.console = False , change False to True and save.
Now you can press Shift+O in game to open console , the commands are on first page.