I've been pondering whether or not to respond with words of encouragement. Some people do have a genuinely hard time drawing, and you may be one of those people.

But I think if you have a skilled, flexible teacher, they will probably be able to identify the particular things you're having issues with, and have you work around them. I don't know how to locate a "good" teacher though.

The classes I'm teaching have been small so far (3-4 people a time). It's become clear that making them much larger would dramatically reduce my ability to provide individual feedback. Most drawing classes I've been to were between 10-25 people. Improvement happened, but on a much longer timescale.

Mental-roadblock-space is large, and I can't cover all of it here. But I think if you can find a good mentor willing to work with you in a small class size (5 or less) then you (and they) can figure out in 4 hours of so if your roadblocks can be worked around.