Institutional style for simple documents in CTAN - folder structure

I developed a very basic style for simple documents for University (https://github.com/baracunatana/docsimplepuj). I’ll like to contribute it to CTAN so other people can use it, but this is my first time doing this so I have a questions:

1. I use a jpg image (university logo) that is in my /img folder. I use it with the relative path to the file (see https://github.com/baracunatana/docsimplepuj/blob/aa37cd192344cc4db0e41ee615f693e485fc342b/docsimplepuj.sty#L50) and it works with the files locally in the same folder as the main .tex file. Will this work if the package is installed from CTAN or will I have to create the /img folder every time I want to use my package?
2. I intend to upload it to /macros/latex/contrib. Is this the right folder for this kind of packages?

Since this is my first package, any feedback regarding good practices is appreciated. The package is quite small and simple.

Thanks,