I highly recommend the extensive series of physics lectures by Prof. Leonard Susskind now available on YouTube! (complete playlist link)
Susskind does a great job explaining advanced physics without the overwhelming technical jargon that makes Wikipedia pages and papers on these topics incomprehensible to me.
With some background in undergraduate physics I was able to start with the “New Revolutions in Particle Physics” sequence and, for the first time, begin to understand what is happening in quantum field theory.
Anyone with a computer graphics background will find Lectures 3 and 4 of the Standard Model series familiar, in which Susskind derives some properties and relationships of rotation matrices. This leads neatly into group theory and some understanding of what the legendary “U(1)xSU(2)xSU(3)” actually means.