Hi,
I cannot be your sponsor but here are some advices. On [1]
you can see lintian warning and errors. You should fix them.
For example: Package uploaded for the unreleased distribution
means that you need to change your changelog entry so the
distribution is unstable not UNRELEASED. Also you should
have Build-Depends: debhelper (>= 9.0), in control file, as
lintian suggests.
A good practice is to make lintian checks locally with the
same level of details as on mentors, in
~/.config/lintian/lintianrc:
pedantic=yes
display-info=yes