This is what me and the wife did.... and what we learned.
First, we did a one week skippered charter
in the Ionian
. We then completed a 5 day RYA Day Skipper (DS) course in tidal waters and converted that to an ICC. We also did the RYA VHF
SRO qualification. We did the theory sections of both courses on-line. Wherever you do your DS, do it in tidal waters. The qualification carries more weight when you bare-boat charter. The Med
is not tidal. the rest of the European coast is. You mention 'warm and sunny'. Try the Algarve or Gibraltar
We then joined the Cruising Association and the UK's Civil Service
Sailing Club and used their crewing
services to get 3 weeks of free and friendly time on experienced cruisers boats. After that we did a self sail flotilla week in the Ionian
immediately followed by a week bare boat around the same route
.... on the same boat.
We bought a 40ft blue water
boat in Lymington and set sail across the Channel to start a very slow circumnavigation
Prior to this we had no sailing experience.
In summary: You should get an ICC and VHF
. These allow you to bare-boat charter and sail your own boat almost anywhere.
After the DS practical you won't learn much sailing in and out of a marina for a day. It's better (and more fun) to passage
make and spend days at a time crewing
on other peoples boats. We found the CA excellent for that.
The Comp Crew isn't worth considering. It doesn't add any value.