Nope, you're not "missing" anything EXCEPT for finding a source of information that "works" for you... Not sure what your LD is but I have a daughter with dyslexia and I KNOW that some approaches "just work" for her and others (normally traditional) don't.
So I would suggest keep looking for other sources/teachers that might present information in way that helps you digest it.
Also, with programming in general EVERYBODY struggles with some aspects - don't beat yourself up about it, it's normal and eventually things just start clicking...
Now, specifically with loops - is there something I can try to help explain or clarify for you?