Where is this folder

I am very very new to wordpress.
I had a company set things up for me and now I am broke…so I am trying to make changes on my own.
I figured most stuff out, but I cannot find out how to access the image folder for the header of my site…I want to replace it with a new image that I am making.
When I click on the image and ask for the source it tells me that it is located here: https://healthbasedmeditation.com/wp-content/themes/maparaan/images/logo.png
But I logged into my wordpress account and I cannot find that folder anywhere.
Please help!