Simulation Tutorials

Hello all, 

I am using this software from 2 weeks now and was able to complete and understand some of the basic functions and examples with the help of the tutorials.

Now, I am eager to solve some more complicated problems. But to make sure that I am doing it correctly, I am in search of some pre-solved solved problems or some advanced tutorials. 

Can anyone just help me in getting those or please share the link?

Thank you all in advance.