Hello, I advise you to practice recognizing and identifying intervals by listening to them and associating them with familiar songs or melodies. Start with simple intervals like the major and minor 2nd, 3rd, 4th, 5th, and so on, and gradually progress to more challenging ones.
In additionn, listen to various songs and try to identify the chord progressions used in them. Start with simple progressions, such as the I-IV-V in major or minor keys, and gradually expand to more complex progressions.