Answer
Before choosing or arranging surfing and surf-equipment services, work backwards from the experience you want and the problems you need to avoid. The useful comparison points are seasonal conditions, instructor qualifications, lesson ratio, board size, rash vest or leash, swimming ability, meeting point, tide, weather cancellation and damage terms.
Surf conditions vary by beach and season, and a calm-looking shoreline can still have currents. A local instructor should make the final call on whether the conditions suit a beginner.
A dependable provider or organiser will answer plainly and will not hide an important limitation behind vague marketing language. If a safety, legal, medical or access question is involved, use a qualified source rather than an assumption.
Confirm the current terms directly, because Khao Lak services and activities can operate differently between high season, low season and periods of heavy weather.