Understanding pronunciation is far more important than learning grammar, vocabulary, and all that stuff. Unless you know pronunciations of words, how can you start speaking? Let’s find importance of knowing pronunciation and hope you find the English accent you like, and that accent will end up being your accent when you’re speaking English.
When a human being utters a word, it always includes an accent. When I speak English, which accent am I speaking with? I used to speak in American English, but I changed my accent into English accent because it sounds natural.