Combine two CC into one, different CC (like SHIFT + key)

That will probably be trickier.
As you’re fairly new to Midihub, I’d recommend starting off by trying a map from PAD to Bypass on a pipe and watching it action as you press the pad. That will giveyou a feel for how your combined plans will work in Midihub


btw, take a look at the New To Midihub topics starting here. They look to take you through a hands-on learning experience including mappings to change behaviour of input.