The camera is a basic but important thing, because it makes your perspective about the keys
You have to choose one, because if you let it in basic it will be changing anytime and learn will be harder because u will seeing like this face <_>
You can change this in game pressing "f3"
There is the perspectives what you can choose:

La cámara es algo básico pero importante al momento de aprender a jugar 10 estrellas, porque nos dará la perspectiva que buscamos de las flechas. Les recomiendo no dejarla en básic, porque esto hará que la cámara cambie a cada momento y terminarás perdiéndote en las flechas
Puedes cambiar la cámara presionando "f3"
Aquí les dejo las perspectivas que pueden elegir:

Many people dont know it, but you can change your key's sound too.
It can help you to feel better the rhythm. You can change this in game pressing "f4"

Mucha gente no lo sabe, pero puedes cambiar el sonido de las teclas presionando "f4", esto te ayudará a escoger un mejor sonido y sentir mejor el ritmo de las canciones

The spacebar is the most important thing in the game, if you are good at this let me say you. You will be with the best players of LoveBeat. For make this better you can use the second tip and choose a good sound for your rhytmh

This is the second most important thing, you have to try press the three keys together.
You can try to learn it like combinations of keys. When you domain this you will see three keys like one and the game will be easier

I'll let a video in spanish that's because in this part i just writing english if you have any question about it just comment and i'll help you