Nobody is jumping in and I did offer my help, after all. I'd forgotten I have an old Flickr account, just checked so let's see if we can figure this out together.
First things first, you have to upload a pic from your computer to Flickr's servers. Looks like it goes like this:
1. Create a Flickr account (looks like it's still free up to a point)
2. Log in
3. At your main page, around the top right you should see a little symbol with a cloud and an arrow pointing up inside the cloud. Other services let you upload from just about anywhere, Flickr seems to be a bit particular and it took me a while to find the upload icon after all this time.
4. Press the icon and follow the prompts to upload a pic. you might want to create an album and call it "FSM" or something.
5. See how far you can get and we can move forward from there, how about that?
If anyone else (maybe more current with Flickr) can help, do feel free to jump right in, please.