It's a webcomic. I love it. I want to share it with you.
Here's the thing though. The first official EGS comic was back in 2002, the art and writing were not fantastic at that time, but now, it is by far my favorite. There isn't a point in the comic where I can say "just start from here", because the story constantly builds upon events in the past.
So instead, here is the beginning of the most recent finished story arc, A Date at the Mall: http://www.egscomics.com/index.php?id=2023 If you like this arc, and want more EGS, it's definitely worth going back to the beginning and reading the whole thing. If you would prefer to take my word for it and avoid any potential spoilers, here is the first comic: http://www.egscomics.com/index.php?id=1
(And there will absolutely be spoilers in A Date at the Mall, XXXXX's entire existence is a spoiler, as is XXX's relationship with XXXXXX, not to mention Elliot's ability to XXXXXXXXX and why that's even a thing)