Centering unordered lists in tribute page

Im almost done with my project but the problem is that my lists are centered but not in line with each other.
In the example Quincy Larson used the grid system but i didn’t really understand it so i built without it.
Should i redo my projects with the grids or is there a way to fix it?

Here is the link to my project :

Change the ul css to:

ul {
list-style: inside;
display: inline-block;
text-align: left;