I found that the member login app had too many limitations. Perhaps I was not using it correctly, but if you can follow these links, it will accomplish what you are trying to do and perhaps be more helpful for understanding down the road… good luck.
https://support.wix.com/en/article/how-to-create-member-profile-pages-with-wix-code
and also Nayeli’s helpful video here: https://www.youtube.com/watch?v=Orl8GJNzG5s