The three have a lot in common, with key differentiators e.g. the backbone connectivity of GCP is far different than that of AWS. What worked for me is that I

The three have a lot in common, with key differentiators e.g. the backbone connectivity of GCP is far different than that of AWS. What worked for me is that I went deep into one of them, then uses this resource to 'map' what I learned on GCP to AWS: https://cloud.google.com/docs/compare/aws https://cloud.google.com/docs/compare/aws (use the table mid way down the article), and this gave me a great framework on which to build my AWS knowledge. A similar table exists for Azure (https://cloud.google.com/docs/compare/azure https://cloud.google.com/docs/compare/azure)