I earned AWS solution architect - associate certification on Dec 19th, 2020.
These are the Section 1 of my personal notes majorly from Neal Davis's AWS SAA-C02 Training book combining with notes from several other sources. (Also see Section 2 for practice tests notes)
I strongly recommend to buy and read Neal's book, which is an awesome reference book for preparing for the exam within short time.

You may also download a PDF copy: Download Link.