First of all I'd like to say I'm fairly new to Moodle, I have been administering two sites for a total of around 6 months so far and have been picking things up as I go. 

We've gotten to a point where we need to update the site to comply with GDPR and to hopefully fix a bug our users are experiencing relating to SCORM packages not recording data correctly, with tried and tested packages but that's another issue altogether.

When upgrading Moodle in such a big jump what shall we look to test once we have upgraded? I'm thinking to test plugins, course SCORM packages and course completion records to see if they work as expected but I want to check if there are any standard methods for testing that anyone uses that may be helpful. I won't be doing the upgrade myself, our IT director will do this as we have no access to the back-end of Moodle and so only have access to settings via the site itself.

Any help/guidance would be really appreciated!