Give me some started citations to begin thinking about these:
Based on scholarly sources, compare and contrast the components of instructional design and curriculum design in the development of an online course.
What considerations are necessary when designing a change to the course content and delivery modality?
I have given you several citations here to get you started. I hope that you have some databases at your disposal in order to access at least some of these scholarly articles, as that is a requirement of your question. I also attached one article that I was able to access and download. I hope these are enough to get you started.
I would definitely look at ADDIE and some other Instructional Design models in order to answer your second question about changes in ...
These are several citations of articles or websites about instructional design and curriculum design