I'm taking a summer electronics class right now and we're using the book

Electrical Engineering, Principles and Applications, by Allan R. Hambley, Fifth Edition, 20011.

So far deriving the differential equation is a pain from 2nd order dc and ac circuits.

The class is covering the following

Analysis of resistor circuits
First order circuits
Second order circuits
Sinusoidal sources and phasors
Complex impedances
Diodes
FET and BJT Transistors
Operational amplifiers and amplifier circuits
Filters, transfer functions, and Bode plots
Transformers

Does any have resources on worked out problems and videos covering how to solve for for reverse biased and forward bias diodes in series and parallel with multiple sources of power including voltage and current sources?

I'm nor an ece major btw, I'm meche