So many of us say we want to learn to draw and then go whining about how we don't have the time and I include myself in such whining. That's why having a creative prompt every week motivates me to at least do one doodle a week - it is not hard to do.
Suggestion that works for me - when I talk on the phone or am in a meeting, I doodle.
Why not multi-task and practice your drawings then. Get over thinking it has to be a masterpiece - who cares! It's the doing that counts and I at least get a sense of satisfaction that I drew something.
Try it !
Artquiltmaker does a good creative prompt every friday - one word to be interpreted as you wish.