From looking at your work so far I would suggest that you need to just do one exercise everyday. That is drawing straight lines point to point, using ghosting. Do this every day filling up a page of A4 at least.

Your lines at the moment aren't good enough to make the subsequent exercises useful. They are too wobbly and sketchy. Once you nail that, then move on to the next one.

Pace is a thing that isn't often mentioned, but trying to rush through without nailing the basics to a good standard just means that problems compound. Take your time but practice everday if you can. Compare your lines to some professionally critiqued submissions and see how they compare. Not expecting that your lines should like like they are drawn with a ruler but they should be getting reasonably close before you move on. IMO.