Formal training helps in laying down a foundation, but it is practice that strengthens it...There's no secret to great drawing skills, as I have come to learn...it's a lot of hardwork - are you up for it?!
No study of art is complete without understanding perspective. When I first explored this formally, I was also playing around with Sketchbook pro for the first time...so, you should probably excuse the hatching and grey tones!!
Drawing from life is a great way to get that mileage into your art...Also, it's a great place for ideas for the future -
Let the world inspire you! Observational drawing from life is a great way to get inspiration , and hone your drawing skills.
The challenge is to try and capture a face or a gesture within a few seconds, it helps you look out for the most defining characteristics of that person or pose...