Hello all, I`m new here I hope this section is the correct one to make a suggestion.
What a new user wants to do is probably installation, put text into a page and then change the header image and change some css like the colour of p and maybe text-align left for h2. It is difficult to understand how to manage a header image but the last 2 things cannot be done online through the admin interface at all. It has to be done through a custom.css by ftp. In my case it took me a while to find this as I was searching for the css settings elsewhere to possibly change them.
My knowledge of cms was rather 15 years old when I got here. As far as I remember there were few to no CMS where I could change the layout (theme, css etc.) online. Still today this is rather a dead topic. But it would be so easy with grav to edit the custom.css online e.g. through the pages editor.
All the documentation is great, but a newbie can easily get lost with the first steps which to me seem pretty typical.