In learning English, it's normal to start with the basics: grammar, vowels, consonants, and vocabulary.

However, you need to learn stress and rhythm to be able to express yourself correctly and more clearly when speaking.

Stress and rhythm are necessary for you to be understood when you speak, and for you to understand native speakers when they speak naturally.

Click below for details on the role of stress and rhythm in English speaking

https://www.youtube.com/watch?v=qi5uVE8RVfU