What are the Best Sources for Beginners to learn Javascript?

i am an commerce student you may say it'was' an commerce student.I am working on Web Designing and wants to go in Javascript.I had done HTML &CSS course from Codecademy and 1 course from Udemy and after that 1 from edx.Now i am 'ok-ok' Web Designer.Currently i am working on my Bootstrap Skill.Now i want to Learn Javascript.I had google so many times.Done the course of Javascript from Codecademy(Didn't understand so much what i had learn).I need a source to learn Javascript for a absolute beginners.Even i don't know what is syntex console and so on....Help me i am in Trouble...I wants to make My carrier in IT.