SHOOT ALL THE TIME. Find what you love to shoot and then keep shooting it. Learning about f stops/aperture is key to start controlling your image in my mind and then start to learn about light. I say “start” to because really you can never learn everything about lighting.
In the days of the internet Id just suggest getting started by reading about “lens length” and “depth of field.” If you go into a store and see a photo book that has images you connect with then get it and read it. Otherwise you will learn most of what you’ll need just by shooting and experimenting.
Derek Woods Photography 