Top advice!, I wanted the key-light lower, the settee was in the way, and I didn't realise the catchlight was missing (ruins the image IMO) until later!
I also added a bit more fill light later on the left, I kept moving this/trying new modifiers to see how it looked..
The background is lit with one light, but my colour picker shows 255,255,255 all accross it, the bottom left is 235-240ish accross the board according to the colour picker.. Although it looks OK on my calibrated monitor, it looks really grey on my laptop!,.. I never know what to adjust for, or if I've messed the colour profiles up..
Just to check, my first PP step is to try setting the white point to the bottom left, which gives.. does that look better?
(Trying to keep it all default OOC)