https://www.musical-u.com/learn/play-melodies-by-ear-using-intervals-a-roadmap/
Singing melodies by ear is very intimidating for many musicians.
That’s why Musical U has developed a roadmap to give you a step-by-step approach to learning intervals.
https://www.musical-u.com/learn/play-melodies-by-
ear-using-intervals-a-roadmap/