I believe the best way to learn a new skill is by combining theory and practice. I picked up my first Tarot deck in 2015 but took a couple of years before immersing myself entirely in it.
In the summer of 2019 I figured it was about time to fully commit to learning by doing, and started carrying around the 22 Major Arcana from the Rider Waite Smith and offering readings to just about everyone I met.