I can help you acheive your qualifications Isle of Wight Based Powerboat School East Cowes Marina running 99% of the courses you need we dont do sea survival but will recommend a couple of good places.
Plenty of Online Schools offering theory have a look at www.rya.org.uk
or take the recommended ones on here or do a 5 day intensive with me .
Followed by VHF DSC First Aid Level 2 Intermediate then Advanced .
After that you will need to build up some sea miles before you go on to take the commercial endorsement can arrange that for you as well.
Or you could go to Doug on the English side of the Solent nice people .
All the best