OK, let's go.
The protagonist... I liked that he has a backstory and that he is having personality development, as reading about some protagonists that have appeared recently was tiring me a little.
His family... so far I'm enjoying his interaction with his family, I think it could improve in some parts, mainly to show him developing more with his mother, since so far the contact with her hasn't been that much, but with his siblings and father are great.
Is the system... an OP system? Yes, but less than I thought it would be. From what I read in the synopsis, I thought he would really become the best singer in the world in a few days, but the development is much more realistic, which is much better, since if it were like the synopsis I don't know if I would be able to read it. . I'm seeing your clickbait Nunu!
Update stability... so far it's ok, the chapters are long, from what I've seen it already has some advanced chapters, so I don't have much to comment on that.
The background of the world... so far is being explained slowly, there is still a lot that hasn't been shown, so I won't say whether it's good or bad, but what has been shown so far is very consistent.
Overall, a 4.8/5, keep posting and I'll keep reading :)