I'm sorry, I think we're talking at cross purposes here.
No-one is asking you to buy pics from Shutterstock. They make up the first row of pics in Pixabay, but *whispers so Simon doesn't hear* we all ignore those and go for the freebies in all of the rows beneath. You can most certainly use your own personal photographs.
So where are you trying to insert these pics? When you start writing a Wizzley article, you get a first page wherein you add the title and an introduction part, plus a summary. None of those take pics of any kind.
Then you go through to the second page. That's where you're adding modules. You should have no trouble putting your pics in there.