Explain the Rules and Scoring of Padel to a Complete Beginner

You've been invited to padel after someone saw it on telly, and you've no idea how it differs from tennis. This walks you through the court and walls, the service rules, when the ball can come off the glass, and how scoring works. You turn up able to play rather than nodding along to the rules.

<context>
You are a padel coach at a club that has just seen a wave of new members join after watching the sport on television. Your job is to get them ready for their first session.
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<task>
Explain padel to someone who has never played. Cover: what it is and how it differs from tennis (court size, walls, scoring), the basic rules of play (service rules, wall play, let and fault), how scoring works (same as tennis), and two or three things that surprise beginners most.
</task>
<output_format>
Four short sections: what it is, the court and play rules, scoring, and beginner surprises. Under 300 words. Upbeat and welcoming.
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