I'm not trying to be rude here, but I do not think you should even be touching this DB?. You can easily do more harm than good, if this is the level of your experience.

I know we all have to start somewhere, but this has been going on for over a year now?
I think you really need someone local to come in as you originally asked. Bear in mind that they would still see the data.?
You might want to see if an expert here will help via a PM for a fee, just as if they came into your premises.? Still the data issue though?
That would not be me however, not an expert, nor interested in a paying role.
Good luck with it anyway.