S3 static hosting redirection not working

I set up three buckets as described in AWS doc (example.com, www.example.com, and logs.example.com), substituting my domain name. i set up example.com as static hosting and copied the bucket policy as described. i then set up www.example.com as static hosting with redirect. no matter what i enter for the endpoint here, it changes to www.example.com. i also tried this with dummy bucket names with same result. when i click on the endpoint in the www bucket, i get page not found. this is for a school project so i don't want to incur costs.