"Which insect repellants work best?"
Insect Screens and Repellents
"For ease of handling, reefing and simplicity the junk rig is hard to improve on."
Computers on Board
Ports and Windows
So many skills! Sailing, Shorthanding, handling Heavy Weather, Anchoring, Docking and Mooring, Motoring, and Crewing to name some major ones.
A good cruising skipper has Piloting Skills, knows about Weather, maybe even knows Celestial Navigation. And the crew should at least be good at Watchkeeping and Log Keeping.
Are you ready to handle a Grounding and Towing situation? A Collision? Crew Overboard? A Medical Emergency. Do you know the VHF distress protocol?
Training for formal Qualifications, can be the best way to learn about sailing, mechanical systems, navigation, and other subjects. Or attend a Cruising Schools to get both instruction and sea time.