I totally understand. I do have pointers, just keep in mind they're things that worked for me. SO may or may not apply or make sense for all. As far as lines/circles go these are just mechanics and muscle memory. I think some of the early exercises I introduce may help here with practice. The point to point exercise with straights is really helpful with a focus on drawing from the shoulder. For circles I like starting out with a box and dividing it up as my template for where the circle should hit. Both these exercises help make clear what I'm doing wrong. Knowing this, I can make adjustments based on whatever it is that's off. Maybe I sit differently, emphasize my shoulder more, stop staring directly in front of the pencil and instead look at the point I'm aiming for, etc. I think the big lesson I learned, however, is that practice doesn't really make a difference if it isn't focused or intentional. If we just draw, we're likely to continue making the same mistakes regardless of how often we do so. That's why I do these little exercises, so I'm brought back to what's gone wrong and how I may practice differently to address it. As it pertains to the figures. In the demonstration I've shown, I have a really specific and linear process. This is for the exact same reason. Each step addresses one thing. As such, I only focus on that skill or technical stage in the drawing so all of my focus is on making tilts, shapes, perspective (or whatever). If I don't stay organized then I find myself becoming very unintentional and easily slipping back into repeated patterns. Ok, hope some of this might help with your question. Sorry for such a long reply.