The beginning and end should give you a good grasp of the basics. I know at least with my posts they look back a little. But it would probably be good to read the other posts when you get the chance. I know some of the other characters have long running plots that sort of require the older posts to fully understand. My do as well to some extent, but they can be figured out mostly without that need. But like with anyone's posts there is a lot of flavor missed out on if you skip the other posts.

Since we'll be starting a new arc soon-ish. A lot of those things won't be as dire since they will be more character development pieces. But its all foundation material.