Generally, there are two kinds of works for uploading, original and cover. If it is covered, the card is quite strict when applying. There are some requirements for sound quality, later stage, singing skills, etc. And it takes a long time to submit, so the application is very likely, but it is not clear whether the standard has been improved or decreased (please be careful about copyright issues, musicians who apply for cover without authorization will not be able to pass).
Then there is originality, which is simpler than cover. I applied for the original version, although almost no one listened to the music. I'm not sure about the difficulty of songs with voices, but as long as the structure and orchestration of manual arrangement are complete and the sound is smooth, and if it is a little better, I can do pure music and light music. If you bring lyrics, it is troublesome to consider recording and post-quality, and it requires higher equipment and post-processing.
In short, I feel that the application of Netease musicians is not at a high access level. Amateurs like me can apply. As long as the work is complete and there is no copyright issue, I think it should not be difficult.
However, if you want to apply for a cover work, or the post-recording level is similar, I think it is easier to start a radio station or something, and it may also avoid some copyright disputes and difficulties in auditing.