Awesome man! Please let me know when this courses are available.
Yes man I know, I am trying to use Google, promise 
I hope you don’t get mad but, just got one more question:
Just wanted to know where I am supposed to get mockups, pictures, videos for demo content on themes? And also where to get icons or graphics that can be use on themes? (developer licenses)
Thanks again!
There already is a thread here on forum with long list of free image resources you can use, I haven’t bookmarked it, you will have to search for it. But here are some most popular resources:
Images:
Videos:
https://www.youtube.com
Of course CAN’T just download videos from there and upload them on your server just like that, but you can embed most of them
Icons:
https://fortawesome.github.io/Font-Awesome/
https://icomoon.io
@LSVRthemes Awesome info bro,
Thanks a lot for the help man you are awesome!!!
Still got one question, I hope you can help man, here it goes when I see wordpress themes offering lot of layouts on them for different business like for example enfold, betheme, avada and lots more, what exactly this means? This means that it comes with different demo contents or how it works?
Since I want to offer different layouts too.
Thanks man!
This is a very theme-specific question, but I guess most of those themes come with separate demo data for each of those niches their offering. But there is no general solution for this, it really depends on the theme itself.
few years of experience will teach you how to create great products 
Yes it seems is all about demo data for each template they offer, what is the best way to offer this since for what I see some of them offer a plugin developed by them to upload this data, so is there any plugin it can be use or I need to develop this too?
Thanks man!
Thanks for the support man!! Believe me I am trying my best
https://developer.wordpress.org/themes/basics/ Simple guide
https://videos.pexels.com/ <- free Stock videos
http://allthefreestock.com/ and much images
thanks for sharing, i was just looking such tutorial and stock images. I will check whether I can find what I need.