It is not difficult for Netease Cloud musicians to apply. You need to provide your basic information and upload original or cover works.
Generally, there are two types of works applied for uploading, original and cover. If you cover it, the card was quite strict at the time of application. There are some requirements for sound quality, later stage, singing skills, etc. It will take a long time to submit them, so it is very possible to apply for them, but it is not clear whether the standards have improved or declined now (please be careful about copyright issues, and musicians who apply for covers without authorization will not be able to pass).
then the original, which is easier than the cover. I applied for the original, although the music was basically not listened to. I'm not sure about the difficulty of songs with voices, but I can make pure music and light music direction as long as the structure and orchestration of artificial arrangement are complete and sound smooth, plus if it is slightly better. If you bring lyrics, consider recording and post-quality, which is more troublesome and requires a little higher equipment and post-processing.
In a word, I think that the application of Netease musicians is not at a high level of access. I am an 18th-line amateur who can apply for it. As long as the works are complete and there is no copyright problem, I feel that it should not be difficult.
However, if you want to apply for a cover work, or the recording level is about the same as that in the later stage, I think it is simpler to start a radio station or something, and it may also avoid some copyright disputes and difficulties in auditing.