My experience in singing is that if you don't learn to sing professionally, you can tune the sound effect into K-song form when singing pop songs, that is, the echo is relatively large. You only need to sing softly in the high-pitched part, but sing the last word with a little emphasis and turn on the air. By using sound effects, your voice can be extended a lot, and it will sound more mellow.
When singing pop songs, there is no need to deliberately spare any coloratura, nor to use nasal and chest sounds too much, and I don't need to be too angry. I sing pop songs easily, and it's OK if it sounds real and moving.
If you sing songs like rock and roll, you can open your throat and roar as much as you like. Rock and roll is the feeling of heartbreaking, and you are not afraid that the high notes will not be able to sing.
If you sing the songs of Wang Leehom, Tao Zhe, Jay Chou and JJ Lin, you should learn to sing the high notes in falsetto. If you can't, you can refer to the method I mentioned earlier to sing karaoke.
Personally, I think it is relatively easy for boys to sing the songs of stable singers such as Andy Lau and Jacky Cheung, because the voices of these singers are close to those of common men, and they just need to sing with sincere feelings, and the skills are not too difficult.
If you are determined to sing popular songs well, I suggest you practice your breath more. Many times, you can't sing high notes because you don't have enough breath.