I just joined a new company with AWS technologies so I am beginning to learn AWS more deeply. I found really good source of LABs which I can use and it is called Qwiklabs.
It has a benefit that it starts a pre-build AWS environment with all settings where you can play with all the settings and prepare the LAB scenario by LAB tutorial.
The only disadvantage which I see now is that LABs are not somehow very complex. But I believe that Qwiklabs is a pretty good start for anyone beginning with AWS.