You do realize that being able to draw well takes years of steady study and practice?
You're living in a dream world if you think you'll go from just starting to amazing by reading tutorials.
Focus on learning to draw for the sake of itself. Just do it. Observe life. Really pay attention to what you're looking at. When you draw from life, draw WHAT YOU SEE, not what you think it there. I'm a cartoonist, so I know that it can be a little jarring to go from only drawing what you think and then having to draw what's really there.
Just keep doing it. Take classes. Having other students and an instructor helps a lot.
You're doing to have to be patient with yourself and be REALISTIC. This s**t don't happen overnight, kid.
That said..
Basic skills don't start with complex ideas. They start with simple ideas, so you start with your most basic forms.
Get some 3d shapes and draw them. You don't have to buy plaster shapes like I did. I had to for class, but before I could get them, I just went to a craft store and got the white foam shapes that people stick the fake flowers in. You need a cube, a sphere, and a cylinder. (You don't need a cone and I don't think they carry cones that have the right proportions anyway.)
Set them up, put a light on then and draw them. Put the drawing away (leaving the set up where it is) and go relax. Come back after a while and look at the set up. Really pay attention to what's going on. How do the different sides of the shapes look as they turn away from the light. How do the shadows look. Where are they hard, black shadows and where are they soft shadows that help show the forms of the objects.
Look the the ground plane that they're sitting on. What do you notice about it compared to the objects?
Write all your observations down.
Then, look at your drawing. Now that you understand more about what's going on, you can see what you did wrong in the first drawing. Write down what you did wrong and why you think you got them wrong.
If you do this every day for one week, at the end of the week you will see improvement and you'll find that you understand a lot more about how to draw 3d objects in a 3d world.
When you draw people, animals, objects, use these basic shapes to build them. For example, arms and legs are cylinders. You could use a sphere for the head. (I tend to for my cartoons.)
Without understanding 3d forms, you'll find life drawing very frustrating and risk feeling defeated by drawing. It's not hard if you start from the very basic and work into more detail from there.
Get yourself a sketchbook JUST for life drawings. No cartoons or characters or anything that you aren't looking at goes in there. No doodling from your head at all. Each day, do 2 hours of drawing things around your house and outside your house. By the last page, you'll see the difference.