1. Instruments you can learn with no knowledge of music.
1.1. Drum
1.1.1. Drum does not require any special fingering to play it. In fact you can make a sound on it just by hitting it hands or with a drum stick.
1.2. Glockenspiel
1.2.1. Glockenspiel is a smaller version of a xylophone. It is easy because all the keys are arranged in order of lowest to highest, and are sometimes color coded or have letter names on it. This makes it easy to pick up as you just need to remember the sound produced by each key, and hit the right keys with the mallet, in order to play it.
1.3. Electric keyboard
1.3.1. Electronic keyboards are capable of recreating a wide range of instrument sounds and synthesizer tones with less complex sound synthesis. They are popular with younger children and are great for recording and changing performance.Electronic keyboards are usually designed for home users, beginners and other non-professional users. Like the glockenspiel, the keys are arranged in order of pitch.
2. Instruments you can learn only with a knowledge of music.
2.1. Trumpet
2.1.1. Trumpet has three keys that produce different notes when pressed in different combinations. You also change how you blow air into the mouthpiece to produce high or low sounds. Someone with no knowledge of music will find it very hard to play it with the right techniques.
2.2. Harp
2.2.1. Harp is very hard to play because it has more than 40 strings and you need to learn to pluck them properly and have the right playing posture. You also need to adjust several pedals to move to different pitches or notes. A beginner may not be able to do it correctly without breaking the harp, which can be quite fragile.
2.3. Organ
2.3.1. Organ is very complicated. It has three keyboards for only one person to play, as well as a lot of pedals and switches. To play this, you have to press many things at the same time with both your hands and feet, making it hard.