Just my two cents: learning by "experience" works, but is extremely inefficient, and you don't always get the feedback of your work. You always learn by experience, but you do as much as you can to learn to avoid making mistakes in practice. Compare it to learning to drive: Yes, you learn driving by experience, but you still need driving lessons to avoid getting in accidents.

You can try to learn on your own by reading, but if you want to make serious progeaa, you need a teacher, it's as simple as that.