Its not substantially different that 2.18, so if you already use it you'll have no problem moving to 3.0 (although I believe your models will need to be rewritten). If you are still using 2.XX what you learn here will apply as well.

This is actually a combination of 2 lectures out of an entire course composed of about 70 lectures on QGIS 3.0 for GIS profesionals that will be released mid December, 2017 on Udemy. If you are interested in this or my other courses on web GIS programming there is information at the end of the video or you can go to http://millermountain.com/geospatialb...