To create a S3 bucket in AWS, here are the steps in brief:-
1. Navigate to S3 section in AWS Console.
2. Select on Create Bucket.
3. Fill in the credentials as per your requirement.
4. Click on Next. Skip all the other steps. It is not required now. Click on Create Bucket.
5. You can either search by name or scroll down to find your created bucket.
You have created a bucket. Hope this helps.