I took devops course where they teach jenkins ansi...

I took devops course where they teach jenkins ansible puppet git .. but the training is of no use 6 day they teach git which is of 30 minutes max if u study by ur own. They teach jenkins ui for 4-5 days ,groovy script 15 minute and other tool ansible puppet 1 hour max cloud 1 hour . All easy topic they drag and waste your time sachin is one tutor who gives devops class he directly says I will not teach difficult topic ..pls dnt waste your money .