how do I upload a picture on my profile site

There are very good instructions on the profile page.

HOW TO UPLOAD PHOTO
Are you trying to upload with a mobile device?
http://m.mingle2.com/users/edit_photos
Or from a pc?
http://cpn.mingle2.com/user/edit_photos

(Mingle2 does not support Windows-based phones).

When it comes to uploading images to a Mingle2 account, the actual file
size is almost unlimited. The number of pixels in the image however
is limited to 10 million. In other words, the product of width*length
must not exceed 10000000.

Pictures should be in .gif, .jpg, or .bmp format.

The picture has to be on your computer/device, not on a website.

If this does not fix the problem, look in the help section http://cpn.mingle2.com/forum/forum/7

Di
Site Moderator

Hi David
Go back into your profile, click on edit profile. Then click on General you'll see a space where you can download a picture of yourself. Just make sure the picture is on your phone or computer, whichever device you using. Good luck...
Oh and welcome.