Portfolio...not quite done, but I need to move on

Here is my Portfolio page. This has taken me a long time to do, so I decided to move on and fix it as I learn more. I’m having problems with the navigation working on the ipad/iphone and also the images loading on those devices.
My navigation doesn’t seem to center in xs mode and I can’t figure out how to shrink my bootstrap columns even further for my “Project” boxes in xs mode as well.

Any advice, comments, suggestions is much appreciated.

Thank you!