That’s totally fine @Damodougan. Quite a lot of candidates do that. The common advice is actually harness the best out of both sources: the curriculum is pretty good for End of Chapter questions and Ethics chapter examples, whilst 3rd party materials provide good summary that cuts through the lengthy CFAI curriculum.
try reading essays on this book, each of us understands the idea differently and is probably the best way to understand and compare everything. you should always compare. because some of us notice more hidden undertones