When I was in middle school my english skills were terrible, I barely passed my english classes. At some point I was interested to build my own PC, so I did research and watched tons of videos of other people doing it, those were mainly in english and helped me a lot to learn the language. Just like you I did not use a translator, it was not necessary to understand the key messages of the videos. After some time my english skills improved substantially and in school I never had problems with english again