After 45 years of teaching guitar, I’ve seen the same mistakes come through my door over and over. The good news? They’re all fixable. And knowing what to watch out for will save you months of frustration.

This is part of our beginner guitar lessons series, where we cover everything you need to get playing.

1. Wrong Guitar Size or Shape

If your guitar doesn’t fit your body, everything is harder than it needs to be. A guitar that’s too big forces you to reach awkwardly. A flying V is a nightmare to play sitting down. And a guitar with the action set too high (the strings are too far from the fretboard) will make chords feel impossible. Related lessons: Beginner Guitar Chords and change chords smoothly.

Before you blame yourself for not being able to play a bar chord, check your instrument. Sometimes the guitar is the problem, not you.

2. Bad Posture and Seating

This one causes more problems than people realize. Sitting on the edge of your bed or sinking into a cushy couch puts your body in a position where reaching the fretboard becomes a fight. If you want to get ahead of most beginners, learn the notes on your fretboard early — it makes everything else click faster.

Use a firm chair. Keep your back reasonably straight. Position the guitar so your wrist doesn’t have to strain to reach the frets. If you’re standing, keep the guitar at roughly the same height as when you’re sitting — don’t sling it down by your knees.

I play eight to ten hours a day and I’ve never had tendonitis. That’s not luck. It’s because I’ve always paid attention to how I sit and hold the instrument. Your wrists and forearms will thank you later.

3. Expecting Too Much Too Soon

You’re not going to sound like your favorite guitarist after three lessons. And if you’re starting as an adult, it’s going to take longer than it would for a teenager. That’s just reality.

Be patient. What you put in is what you get out. But “put in” means consistent daily practice, not a six-hour binge once a month.

4. Inconsistent Practice

This is the big one. I had a student hunt me down wanting private lessons. I told him straight — I need you to commit to at least an hour a day of practice. His first lesson, he tells me he’s going out of town for three weeks. I had to let him go. One lesson followed by three weeks off means you’re starting over every time.

You don’t have to practice in one big block. Ten minutes here, fifteen minutes there — that works. Keep your guitar on a stand where you can grab it easily. The key is steady and consistent. Fifteen minutes every day beats two hours once a week. Every single time.

If you need help structuring your time, check out my guitar practice routine for beginners.

5. Not Listening to Yourself

A lot of beginners are so focused on getting their fingers in the right spot that they forget to listen to what’s actually coming out of the guitar.

Record yourself. Use your phone, your computer, whatever you’ve got. Play your chords, then listen back. Are all the strings ringing clearly? Is your rhythm steady? Does it sound like what a chord is supposed to sound like?

A recording device is one of your best teachers, especially if you don’t have access to a live instructor every week.

6. Hitting the Bass Strings Too Hard

This happens constantly with chords like C and D. You strum too aggressively and the low E string overpowers everything. On an acoustic, it sounds woofy and muddy. On an electric with distortion? It’s just noise.

A D chord only uses the top four strings. If you’re hammering that low E string on a D chord, you’re killing the sound of the chord. Same with C — you want the chord to ring out cleanly from the 5th string down, not get buried under a boomy bass note.

Related to this: pressing too hard. If you squeeze the neck like you’re strangling it, you’ll actually push the strings sharp and the chord will sound out of tune even if the guitar is perfectly tuned. Use just enough pressure to get a clean sound. No more.

7. Skipping Theory Entirely

I know. Theory sounds boring. But here’s the thing — without some basic theory, you’re just a tape recorder. I teach you a song, you play it back. But you can’t figure anything out on your own.

Theory doesn’t mean learning to read sheet music (though you can do that later). It means understanding how your guitar works. Where the notes are. How chords are built. Why certain chords go together.

Bonus: Pick the Right Guitar for Your Music

I had a student walk in with a cheap acoustic guitar. I asked her what she wanted to play. She said she loved Stevie Ray Vaughan. Well — aside from maybe two songs, everything Stevie played was on an electric guitar. A Strat, specifically.

It’s no harder to start on electric than acoustic. Pick the guitar that matches the music you want to play. You’ll enjoy practicing a lot more, and enjoyment is what keeps you going.

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