The two big secrets of learning to draw

 There are two things that are crucial in learning to draw and they are something no course can teach you just like that. 

1. learning to see

You know what a rose looks like and you look at it and see all those pedals. Great. Now try to reproduce them with a pencil on paper. You'll end up cross-eyed and your rose does look nothing like your reference. You look closely and suddenly things are not as clear anymore as you thought they were. Where does the one pedal end and the next one start? And how does that other one relate to them? 

There are techniques to help with this, like starting with the overall shape and then going more and more into detail. But those details are still tricky. In the end, practice is what teaches you to see your subject the way you need to be able to draw it. 

2. eye-hand coordination 

Yes, drawing has a lot to do with this. Being able to see your subject correctly is one thing. The next step is for your hand to reproduce what your eyes see. This is like when you learn to play tennis. You try to hit this ball with your racket and fail a lot. You are told not to aim at that ball with your racket or your hand, but with your eyes. This is why they say you should look more at your subject than at your drawing. You train your eye-hand coordination by doing, drawing by drawing. 

There are no shortcuts to these two aspects. Learning by doing will get you there. The more regularly the better.