I took the long URL
https://lh6.googleusercontent.com/-...AAAAAJU/Wa4VtFXs5BE/s128/bend tools.JPG?gl=US
and shortened it to
http://is.gd/k0ND43
using a URL shortening extension in Firefox. There are several different URL shrinkers, for instance, bitly.com is another one, or tinyurl.com.
However the photo that appears is quite small...looks like a thumbnail photo.
Google photo albums used to be easier to use before they forced the Picasa stuff into Google+. Here's how I share a Picasa album online.
First, using Picasa, select your photos and upload them. Seems you've already done that.
Now go to a web browser and enter this URL:
https://plus.google.com/u/0/photos/
Click on the square button labeled
Albums. At least that's what it is for me, but I have a Google+ page, and if you don't it might well be different.
Anyway when I click
Albums I am sent to a page with all my photo albums. Click on the album you want (your 4 photos). You'll see all the photos.
Click on the square button labeled
More and a popup menu opens. Click
Share Album via Link. Ctrl-C to copy the highlited link. Paste into your message here on VAF.
I created a test album of some build photos I just took (canopy cabin frame for my tipup RV-9A). Here's the link:
https://plus.google.com/photos/106346622652388191518/albums/5732170168193902369?authkey=COflyJv_yvii8wE
Try this last link and you'll see it goes to my test album.
It seems you got almost this far but maybe produced links to each photo?
BTW, I almost don't use Picasa to share photos anymore because of the Google+ nonsense. I prefer Dropbox. But I only mention it as another option, not a suggestion you switch to that.