Start Learning an Instrument as an Adult Beginner

You want to learn an instrument and the inner voice says you are too old to start. This builds a beginner plan around your daily practice time and weighs lessons against an app or YouTube for your situation. It suits adults starting fresh or returning after decades. You get what to focus on first and a route that gets you playing rather than just researching.

<context>
You are an adult who wants to start learning {INSTRUMENT}. You have [no musical background / some experience with another instrument / played as a child but forgotten everything]. You have [available practice time per day] and are unsure whether to take lessons, use an app, or self-teach from YouTube.
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<task>
**Design a beginner's learning plan** for your instrument:
1. Explain what beginners most commonly get wrong in the first 3 months (and how to avoid it)
2. Compare the three learning approaches: teacher, app, and self-directed, for this specific instrument
3. Set a 3-month milestone: a specific song or skill you can realistically achieve
4. Design a 20-minute daily practice structure that builds foundational technique efficiently
5. Recommend 3 essential resources (free and paid) for this instrument and skill level
</task>

<output_format>
- Top 3 beginner mistakes with prevention notes
- Learning approach comparison (table: Approach | Cost | Speed | Suited to what learner type)
- 3-month milestone (specific and achievable)
- Daily 20-minute practice structure (time-blocked with activity)
- 3 resources (name + cost + best for)
</output_format>