Portsmouth to Cherbourg is a very straightforward crossing, given a reasonably favourable weather forecast.
There are no major hazards (shipping lanes, but no traffic separation scheme to worry about); navigation is easy (come out of the Solent and steer 205 degrees for about 75 miles); Cherbourg is a huge
with easy all tides access!
In fact, this crossing isn't all that much longer than going round the Isle of Wight and it will probably be more comfortable too.
Cherbourg isn't a particularly special destination in its own right, but it does make a good stopover.