Welcome to Ello. You might find this helpful tho much of the navigation here is intuitive, it gives instruction for loading photos, graphics and embedding videos too:
To get going...1) put something in your profile..gives people a clue about common interests 2) use the 'discover' feature. (If i didn't have homestead and creative projects to tend i could easily spend most of waking hours here. As it is i check back in the evenings much more than i have on any Social Media.