How to Learn Linguistics?

After a thousand years, after 15 hundred years, people kind of lost their ability to read brahmi. The british deciphered the script. If the british had not done it, we would have done it. So that's why this happened bramin. Even the guptapered script is a script that has emerged out of brami. And so anso. All right, so i hope that a answers this question. I speak five languages,. and i am interested in learning linguistics. How to go about it? You speak five languages. Let's say you speak hindi, odia, canada and telugu. These four languages