it is ! but thats why i like it, there are many tutorials on youtube about sketching but these show you the principles. i've been very interested in figure drawing and there are very few good teachers who have a deep understanding of it. This channel is one of them. Give it a try, i'm sure it will be useful at any stage of learning.

One thing I didn't say in my other comment.

Drawing like a child is a compliment. Children are yet free and mostly unburdened by the aesthetic demands of adulthood.