Now I realize that studying English has more to do with communicating your feelings with another person than just studying a language.
ーNow I realize that studying English has more to do with communicating your feelings with another person than just studying a language.
「英語を勉強することはただ言語を学ぶというよりもむしろ、相手に自分の気持ちを伝えることに関係していると気がつきました」
to have more to do with で「〜よりもむしろ…に関係している」
to communicate one's feelings with another person で「相手に気持ちを伝える」
ご参考まで!