Learn a musical instrument
When it comes to learning a musical instrument, technique is everything. Yes, you might be able to pick up a guitar and learn how to play a few of your favorite songs without too much effort, but if you’re learning bad habits, you’re only doing yourself a disservice in the long run.
If you can afford it, get lessons from a real teacher, at least when you’re just starting out. Many online lessons or apps can show you what to do, but if you’re unsure about anything – your posture, how to hold your instrument, how to hold your hand etc. you might end up just reinforcing bad techniques that will be harder to unlearn in future. An actual teacher will be able to assess your technique and correct you early on.
When it comes to practice, start by choosing a simple song, or even just a portion of that song - anything from a few notes to eight measures will do and practice meticulously with an emphasis on technique and accuracy. Every time you practice, use your smartphone to record yourself. By being able to hear what you play, you can easily assess where your strengths are, and where you need to improve. Maybe you’re hitting the right notes, but you’re playing too slow? Now you know you need to work on your speed.