You have already received some great advice so I will try add a little to it.
In my experience and from teaching, I have found that you can spend more time looking at tutorials, reading books,etc than study.
What you need to do is actually practice. The easiest method and one which I teach is to put yourself together a folder or collection of paintings you admire and enjoy. It doesn't matter if its landscapes,portraits,etc, just something you enjoy and inspires you.
Next, draw them out with a time limit of 20 minutes. Make little thumbnail sketches. Concentrate on big shapes and light and shadow relationships. At the end of 20 minutes, write some notes under each about the composition and what you have learned. Whats the light source, how do we read the composition. How has the artist done this or that. This will force your brain to draw with a reason, and not just mindless copy. Do an absolute minimum of 1 per day. After 100, you will see such a difference to your work. Better if you can do an hour at least. Remember its not about the drawings here. Its an exercise, not a work of art. No need to show anyone them. Work on inexpensive paper. I suggest the little "post it" stick pads. They are a great size and you can carry them anywhere with a pen and draw anytime. A4 printer paper is cheap and great too. All you need is a pen or HB pencil.
When your learning, its a long road, when you become a more experienced painter, its still a long road. Its a skill that requires more than one lifetime to master. Don't be in a rush, take your time and enjoy the journey. Put in the time and learn the fundamentals and you will be rewarded. Happy painting
In the words of Solomon J Solomon, "We do not get stronger by watching others lift weights".