Google voice assitant action nodejs on smart charger NEED help

I want to ask about somethings

I have already ready API REST services (http get,post ,delete … ) for my smart charger at my house AND I want to create a google assistant action (in nodejs with voice) in order to manipulate my charger .

if some one knows about the steps to follow (Iam a beginner) just tell me please because im confused in google documentation slides .

Other advices are welcomed as well!

Thank you so much friendss <3