The subject of Quantum fields is quite enormous, therefore it requires division to handle overwhelming feeling about the subject.
The concepts are divided into parts:
Srednicki has divided the topics on basis of spin of particles.
I will be following Mark Srednicki's book for the below topics of Quantum fields.
To understand the subject well, I have to write the topics in my own language. I like to keep concepts as simple as possible. I would take very simplistic approach to understand and write about these topics.
It is hard to decide which way one shall go, before I begin to write my own understanding of the subject, I am trying to write down the lecture notes of some well known professors. I am starting with Prof. Sunil Mukhi, who is teaching a QFT-2 course on Advanced Quantum Field theory at IISER Pune. The reference to video lectures can be found at:Lecture1