You can either upload them to your computer and then use the upload manager under the Photos tab, or you can email them to email@example.com right from your cell.
Go to your profile, click on "my photos", then click on "upload photo from drive". You use the same button to upload from cellphones that you do from a computer drive.
I would send them from your phone to your email, or a lot of cell phone have a feature that send the picture to a online account.
send it from your phone to your email address then save to your computer then upload to this website
Your phone will email without paying for internet. It would count as a picture message.
What if I dont have internet to send it?
How are you here without internet?