How to start playing the piano?

I would definitely recommend investing in a piano, or at least an electric keyboard (although the touch isn't quite the same), so that you can be doing a lot of practice. Or, make sure you have frequent access to a piano somewhere, perhaps at school/college.

Next step would be to find a local teacher. Although self-teaching isn't impossible for the piano, getting a teacher is the best thing you can do if you're serious about learning. They'll recommend starter courses/books as per their teaching experience, and you can get started.

Buy the one that's electric and start looking on the INternet 4 lessons. In my school u can take an elective and I got beginner's piano and now I'm in Advanced Piano and I'm really good at it. U can try that.