A good way to address this question is to compare learning English to how you learned to ride a bicycle.
Do you remember how you learned to ride a bike? Remember going to bicycle school? Remember those big, complex bicycle textbooks? Remember all the bicycle rules you studied over and over?
You don’t remember, do you? Neither do we.
You don’t learn how to ride a bike by studying. You learn to ride a bike by doing. The same principle applies to learning to speak English.
Let’s go back to the bicycle example. What do you do when you learn to ride a bicycle? You learn how to balance the wheels. You learn how to paddle. You learn how to move the handle so that you can make turns. You learn how to stop by braking. But you learn all of these by doing, not by watching some video or by sitting in a bicycle riding class.
Learning to speak English is very similar. You will learn certain language patterns by having conversations with people who are more fluent than you. You will get a sense of which words to use where. You will remember where to stress when pronouncing certain words. Your brain will get used to sounds that are foreign to your native language.
All this will only happen by doing. By practicing. Just like when learning to ride a bike.
And practicing a skill is hard. You will not see improvements over night. You will make the same mistakes again and again. But everyday you will be a little bit better than you started. You will gain more confidence and feel better about the process of learning. Until one day, you will find you can speak English fluently.