Have just completed a MSc and toying with the idea of a PhD. Humanities subject. During my MSc my lack of Excel skills were really evident but didn't have too much of an impact as the number of unique records I was looking at was fairly low. A similar PhD will involve looking at a lot more and I think it would be a good idea to get some Excel training - I can add columns, produce charts etc but struggle enormously with formulas and things like pivot tables are a complete mystery.
My potential supervisor has also mentioned MS Access (which I thought wasn't really a thing any more) or something called AirTable which appears to be a cross between the two.
So can anyone recommend free/minimal cost Excel training for this sort of academic use rather than for accounting/finance? I am not sure what the uni offers, if anything.