It's also irrelevant, water is incredibly abundant in our solar system and we don't even have the largest oceans on Earth, they're just the largest ones on the surface.
Where is it?
Bottom line is that water is never in short supply. Nitrogen is likely to be the real bottleneck in our future efforts at colonisation and terraforming - at least till if/when we master star lifting of resources. At that point, mass and energy no longer make meaningful limiters and waste heat disposal becomes the primary menace to further development.
We just need to solve the simple problem of moving it from the atmosphere of Venus to where we want it to be. ;)
At a high enough altitude, both the pressure and temperature drops to Earth's equivilent. If you have a large enough structure that is relatively airtight (it doesn't need to be perfect), you only need a small temperature gradient to keep it aloft in the upper Venusuean atmosphere.
You could have cloud cities with open air balcony areas where you can walk around with only some basic protective gear and an oxygen supply to protect against the corrosive air and perhaps enjoy gliders or other airborne amusements. It's also good practice for when we decide to attempt something similar with Saturn and some of the other gas giants.