https://www.ableton.com/en/live/
https://www.youtube.com/watch?v=0iuRsiKtObw
https://www.youtube.com/watch?v=mxY0x1i3XhY
https://youtube.com/playlist?list=PL9oiyAGA6zOTSPR5-ttojODT4...
Getting some teenage engineering pocket operators is also something I'd strongly recommend. They're affordable and fun! Check out this 8 year old building a tune with them: https://www.youtube.com/watch?v=IhFIUdICYSA