What basic knowledge should I have before I start playing the piano?

Have the knowledge of music first. Each musical instrument has its message.. you must understand your connection to the sound of the piano.

Hi, try looking up some chords online, try C, G, and F first. This will get you started but you will need a teacher to get you much farther

Hi, You can start with some online application and YouTube videos but I would recommend that gradually after first steps, start to get sessions with a teacher

Hi you can try simple piano if you want to play without a teacher. Lots of my students start from this and I can see some progress when I meet them. However, this app is only try to make you play some songs, I can see students who start with that may struggle at some foundation skill like how to get ready in correct position which are important and should learn at the beginning, not after made wrong position as a habit already. So , it depends on what you want,easy songs playing only or go further, learn seriously

Start by learning some basic music rudiments of music and music theory. Get accustomed to listening to the songs you’d love to play to train your ears.

Try looking up some chords online, try C, G, and F first. This will get you started but you will need a teacher to get you much farther

The ABRSM and trinity syllabuses for Grades 1-3 are a good place to start. I would focus on the pieces and see how you feel learning them. After this you can explore favourite songs/pieces you wish to learn.

Most people start out playing songs immediately after they start playing for the first time, however this sets them up for failure in the long term. I suggest learn how to read notes on sheet music first, and then start to drill yourself with scales of different keys (for example, C Major, is a very basic one that most people start out from). That way you advance yourself ahead of most people, as scales make your hands more flexible and capable of more technical manoeuvres that your pieces in the future require you to do. However, learning the piano by yourself is extremely hard, so I suggest getting in touch with a teacher (such as myself) and starting to learn the piano with more structure and focus. This way you set yourself up for more success in the long run. I hope this helps!