Go to a yard sale or flea market near you. Someone will be selling a cheap stratocaster model with a horrible 90s amplifier. You can talk them into giving you at least 10 bucks off. Someone else will be selling a digital keyboard that's been sitting in attic so long that the keys are all yellow.
Pick one of these and take it home, then look for a tutorial of a song you like on YouTube, there's always a few dozens on there. This is how a person becomes a musician, and the rest will happen on its own
