Beginner question

I have no idea what to start and with. At the moment, planning to get a (used) Pioneer DDJ 1000. I've been playing with virtual dj here and there,but that was more like "let me see what happens if I press this button" :) Should I take an online course to get the basics?if so, what would you recommend. I love edm music . Where do I get the music from? Etc etc any info that would help a complete noob would be highly appreciated. Thank you very much!