In the tutorials Marjialexa explained how to upload foto's. Link below, when that doesn't work it must be the size of the pic as Yvonne (casteleyn) said. Good luck and look forward to see your projects.
Well I see you got some help, compress(make it much smaller) and then load it to projects
Check the size of your picture. If it is too big it won't upload, which is the usual problem. Compress it in yr software, or take a lower megapix photo on the camera.
I believe you can post the picture in the projects tag hitting the upload your project. Hope I am right and we get to see your pics soon!!