Recommended to build a studio

Hello everyone, i am a novice in Cubase that i’ve recently buy but i’m a bit confused how to begin to create songs. I haven’t got hardware at all. I want to create trance music. I need your help to build my mini studio. I want a MIDI controller (i think it’s the name) a piano (49 or 61 keys).

My budget is around 200 euros. Can you give me advice and suggestions ?

Thanks in advance,