In the question of what dB should vocals be, you should understand that the average decibels will be the “golden mean”.
When you first get on the path of creating sound recordings or music, it is often very difficult to figure out how best to process sound, how to set up sound input and output to your PC, and so on.
Making music is a long and complex process that requires a good understanding of all the details and many constituent parts of creativity.
The simple question of what bit depth I should use to export has a very simple answer.
If during the creative process of development in the music field you have a question, should I master my beat before vocals – the answer will be that there is no clear order and it is best to do it at the same time!