A first practical session normally starts with the boat, personal safety and the wind direction. On the water, you should get time steering, adjusting the sails, stopping and turning. The exact order depends on the boat and conditions.
The RYA's Dinghy Level 1 course covers sailing in all directions plus awareness of launching and recovery. It takes roughly 16 teaching hours, often spread over two days. The official Start Yachting course is two days and covers helming, using sails, basic ropework and safety on a cruising yacht.
You should not need to buy a boat or specialist clothing for a first lesson. Ask the provider what footwear and spare clothing to bring. The RYA says recognised centres provide the training boat, and beginner venues normally provide the essential safety equipment.
Plan the next sail before the first one
A certificate is useful, but regular practice is what makes the lesson stick. Before booking, ask when you can sail again and whether the provider offers club sessions, supervised practice or the next course level.
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