If you've got a few bucks to spare, I'd suggest going out and getting
The Vilppu Drawing Manual by Glenn Vilppu. I've been going through it lately, and Vilppu's approach seems to closely fit the trajectory you're on. Start with little, easy things like learning basic shapes, round shapes first, get comfortable with those, more on to squares, then flexible squares and combinations with round, and so on, building skill and confidence as you go. Better yet, his approach really applies to what you were saying about finding difficulty seeing the shapes in things.
That's actually an important part of learning to draw, making that conceptual jump so that you're seeing things not as whole objects but in terms of structure and basic breakdowns. There are a few entries on the subject at the
Rad How-To blog that Rad Sechrist maintains, go check them out. I'm sure you'll find it useful.
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