I recommend Rita Mulcahy's certification prep, it's a good option to acquire PM Knowledge at your own pace, and is updated to the 2021 exam. Visit this link:
https://rmcls.com/about/rita-mulcahy Saving Changes...
DON'T go for a certification course if you want to learn about project management. Take a foundational, non-certification course from a reputable provider. George Washington University has a certificate program made up of multiple PM courses which are licensed to be delivered by different providers.
"Ambition is like a frog sitting on a Venus Flytrap. The flytrap can bite and bite, but it won't bother the frog because it only has little tiny plant teeth. But some other stuff could happen and it could be like ambition."