There was a recent thread on ~talk about which linguistics habits people find annoying, and much to my horror, I have most of those which were mentioned. After thinking about it a little more, I realized that a lot of these habits were picked up from the media I consume and the people I interact with. I also feel that this problem is exacerbated by my poor knowledge of English grammar.

While I was taught grammar at an elementary level in school, I didn't quite grok it back then, and mostly relied on my instinct, as to what "sounded" right. I have since forgotten most of what I had learnt, and my instinct is failing me - my grammar is atrocious, my punctuation is terrible and I only have auto-correct to thank for my spelling.

I understand that English, like other languages, is constantly evolving. What is wrong now might be right tomorrow. However, I believe that this is no excuse for my shortcomings as there is merit speaking and writing in accordance with what is considered correct in the present day.

I would like to learn English from "first principles", and would greatly appreciate if some users could suggest some books/resources which could help me (bonus points for resources pertaining to British English). Any other suggestions would also be great.

Thanks, and have a nice day.