Adding images and new blog posts in a new wix studio site. Im a user not a creator

I’m having trouble with
I don’t know how to add images to my gallery page or create a new blog post. I am a user not a creator.

Working in
Wix studio

Site link
not published so not showing live on site

What I’m trying to do
add images to my gallery page and create a new blog posts

What I’ve tried so far
cant find specific answers online to my questions

Extra context