Well that's opened up a fascinating new world to me. Is there a name for that regular logarithmic by linear music notation in the first image? I suddenly feel like a whole lifetime of musical enjoyment has been denied to me by the utterly utterly ridiculous staff notation system.
If you like the idea of making music by "drawing" it like this, and you have access to a Windows Machine, I'd recommend playing with FLStudio. With other DAWs I've found that it is more difficult to make music with just a mouse, not requiring real instruments, microphones and (maybe multiple) MIDI controllers. I've been a Mac user for almost ten years now, but the lack of FLStudio for OSX makes me question that decis…
But apart from that, you can do the same things (although less builtin tooling for electronic music, but still enough) with Garageband, and, if you don't have invested in VSTs/AUs, Reason.