Kelsie, it took me several months of trying off and on until I fit on the correct combination of things using my more obscure browser, lack of things like Java, and virus protections but none of that should be your problem.
Most modern smart phones are going to have some sort of "share" feature for your pictures, usually if you send a picture to your email, you can upload that. The FAQs for pictures are stickied here and are very good -- but the problem for me was what they showed in the step-by-step pictures is not what I saw.
https://www.quiltingboard.com/qb-help-center-f27/
For me the problem was that my old school digital camera file sizes are just too big to post here. I started using this simple and easy site here to reduce the file size.
https://www.reduceimages.com/