You can change Author Name in Blogger by 2 ways. One is edit Blogger user profile Display name and second is static author name in Blogger template.
How to add custom CSS in new blogger interface: Blogger theme customization Add CSS option’s position changed. Now, you need to follow new steps for manage custom CSS in blogger.
How to add pages in blogger blog: page have step by step guide to create blogger page with page search description and reader comments settings. You will also get page unpublished or delete options detail.
Blogger SEO settings and best practices: Blogger (BlogSpot) blog SEO settings and blog post and pages SEO best practices for beginners.