I am on my phone but will write more later. There are two ways I upload photos to the site. First is to upload them to flickr and then simply copy the bcc code into my post. The second is to click the box in "export" in Lightroom that limits the file size to 192 KB (typically I print at 1,000 x 1,000 pixels). I then upload those files directly to my post using the picture icon (looks like an animated landscape). Then I double click on the image after it is uploaded but before I publish the post. From here you can control the size of the image. I typically change it from thumbnail to full size. All this is from memory, so someone please correct me if I am off.

I look forward to seeing your pics.