I'd like to post and contribute to this thread. One question I have not found and answer to with the software is how to upload photos. Help.
Welcome to CR.
Use something that you generally process your Image in, Light Room, DXO, Photo Shop etc, loads of software available to do this.
If you started with RAW, convert to jpeg, small size, get the Image under 500Kbs, needs to be in sRGB colour format to show best on CR/Web.
Click "Reply" at the bottom of a comment/page in CR, Make your comments, then attach your Image as an attachment, Hit Save, done.
Look forward to seeing your Images