Learn Quantum Field Theory

I have been learning it for 2 years and I am 3rd year undergrad. I think it would take forever to learn. It involves a lot of maths, but the principles are about where you will find an electron at a given moment in an atom and the fact that particles have wavelike properties and vice versa.
It all leads to the fact that waves can be categorised as distinct packets of energy. I think these are photons?

I saw elements of QFT in the second semester of my grad-level theory of solids class (we used Fetter and Walecka’s book on Many-Body Theory)... It really felt like it went over my head.

Over Christmas break, my dad bought me a book called “Quantum Field Theory in a Nutshell.” It’s pretty casually written, and for a person with a physics background (yet who isn’t a theorist), it looks very readable. Now, I just need the time…