To paraphrase this answer, if a full and complete answer to the question is "yes", the question is probably off-topic.
I would suggest one way to ask a "check-my-understanding" question is to submit the question as a question, on its own, and at the same time to submit your current understanding as an answer. You would want to be up-front about this in your question, so that readers aren't surprised or confused. If you pursue this strategy you'll get feedback on your answer in terms of votes and comments in addition to parallel answers. But what has happened to me when I've tried this approach is that information has moved back and forth between the "question" and "answer" parts of the post, until I've ended up with a much better understanding of where exactly I was confused and a much tighter question overall --- if I even have a question left when I'm done.