Installing and upgrading help

Hi

The thread is quite long, I don't get it all. As far as those two checks are concerned:
- Antelope to Barracuda: Moodle provides you PHP CLI scripts
- uft8 to utf8mb4: Again DB conversions and setting the default values in the DB config for future tables.

I understand that you problems are your hosting providers defaults and the limitations of your administration interface Cpanel. If that is the case, nobody here can change that. So the obvious solution is to change the hosting provider and/or the package. Don't worry about losing your work so far. It is easy to migrate a Moodle site. See https://docs.moodle.org/37/en/Moodle_migration.