Happy to hear you are already looking for opportunities in further studies and that you are interested in Birmingham!
In my particular case, I spent my year abroad here at UoB and enjoyed the teaching and learning atmosphere very much. Having already had the opportunity to gain such insight in the academic and social life in Birmingham, the decision to come here was quite easy for me. However, I think UoB is a great university to study at in general. The campus is lovely and the big postgraduate and international communities make it easy to get to know people and get involved in societies or sports clubs, for example. There are many events which are specifically hosted for postgraduates so you are able to make the most of your time here. The city offers a lot of exciting activities and events as the second biggest city in the UK and it has great connections by plane and train to go all around the UK and other countries.
My personal advice is (and this is what I did for choosing my undergraduate university) is to make a list of what is important to you: the teaching, the course, the freedom of module choices, the city itself, the community at the university and living options. Make a table with each university and write in the columns what the pros and cons are, then come up with a ranking system. It takes time to do all the research about the individual aspects but if you have many different options, this is certainly a way that helps narrow down your choices.
For choosing a particular specialization, I decided on this course because it give you the opportunity to choose your modules very close to the start of your degree and you can study a very wide rage of pathways: for example, early modern literature or digital cultures. The core modules really help you adapt to the academic requirements of English universities as they teach you research and writing skills. The optional modules are completely up to you to choose. I always liked the modern period, for example, but did an internship the summer before I started my postgraduate degree with a literature editor and developed a huge interest in contemporary and popular literature, which influenced my module choices. I would recommend looking through the possible routes through the program on the website https://www.birmingham.ac.uk/postgraduate/courses/taught/english/english-literature.aspx. You will see that there are many different options for you to choose from. As you are only in your second year, you might develop a better idea of your research interests once you start working on your dissertation. If you start applying for a Masters before then, this one certainly gives you the opportunity to decide on a pathway once you have a clearer idea of your preferences in research areas.
I hope this is helpful and I wish you the best of luck with your degree!