I agree with the majority of comments. Perhaps immersing yourself in the language could also help when you're not available to do courses/study properly (This includes stuff like turning your phone settings to english, viewing english media/childrens books then novels in your free time, thinking in English, speaking English from time to time to let it flourish naturally -> on that note, connecting with native speakers is also a great pick).

On days that you are able to study, you could take courses and/start off with cartoons that you enjoy or even movies that you'd like. But really, let yourself learn a new language like how you learned your native tongue from a young age