Recorder is a great starting point. You learn to read music, play in time, play with other people and (later) play in tune.
You do all this very cheaply while you think about what other instrument you want to learn.
You listen to loads of music, see what instruments you like the sound of, then try them - in shops and at children's concerts and the County Council 'Try an instrument' day.
Then when you start another instrument you can already read music and play in time with other people, thanks to the recorder.
Worked for me. Can't recommend it enough.