Final answer:
Beginners into Quantum Field Theory (QFT) can start with Kenneth Ford's 'The Quantum World', John Gribbin's 'In Search of Schroedinger's Cat', and Alastair Rae's 'Quantum Physics: A Beginner's Guide' for a foundation in quantum mechanics and the necessary mathematical concepts before exploring the more complex aspects of QFT.
Step-by-step explanation:
For someone with limited background in tensor mathematics and groups of symmetries, delving into Quantum Field Theory (QFT) might indeed be challenging. However, some resources can bridge the gap between your current understanding and the more advanced concepts required for QFT. As an introduction, you might want to start with Kenneth Ford's The Quantum World (2004), which provides a well-written introduction by a physicist and educator.
Another clear and very basic introduction to the fundamental ideas of quantum mechanics, which forms the bedrock of QFT, is John Gribbin's In Search of Schroedinger's Cat (1984). Lastly, Alastair Rae's Quantum Physics: A Beginner's Guide (2005) is a widely praised book that should also serve you well on your path to understanding QFT.
Once you have grasped the basic concepts of quantum mechanics, you will be in a much better position to appreciate the new discoveries and unanswered questions in the forefront of physics, which includes QFT. It is essential to integrate intuition and the formality of equations, and to have a strong grasp of the basic mathematical tools.
Remember, the wisdom of those who preceded us in the field of physics serves as a navigation guide, but it is also important to look forward to new enlightenment in this ever-evolving discipline.