Cant find Intel 5500 display drivers

I am once again asking for support with my broken arch linux install. I am new to arch, as I have only been using it for a couple months now. But back then, I was installing Arch by means of the anarchy installer and some bash scripts. Recently, I installed Arch manually. The system I have installed it on is a Dell Inspiron 15 3558. So, when I first booted up my new arch system, I went to work on installing Xorg and openbox. I downloaded the required software and attempted to start openbox, but I got an error akin to the following: could not set DISPLAY varible. At first, I thought it was a problem with openbox, so I reinstalled it, but then got the same error. I attempted to get other window managers to run, but all of them responded with errors saying things like "Can't connect to display" or "Failed to start x11". Xinit works, but I dont like having an Xterm window open at all times. Finally, I looked this problem up on the Arch Wiki. I soon found out that I needed to install display drivers. lspci identified my graphics card as follows: 00:02.0 VGA compatible controller: Intel Corporation HD Graphics 5500 (rev 09). After some more digging, I found I needed to install the mesa package, so I did. I also installed the xf86-video-intel package, variations of the mesa package, and others that the Arch Wiki reccomended. But somehow, I still can't start any of my window managers (except Enlightenment20, for some strange reason). Now, I don't know what to do. I can't find anything about identifying what package to install for intel i3 5500 drivers, mesa doesn't do a thing, and most of all, I can't find anything about the 5500u in general. What do I do? Have I installed the wrong package? Is there another package I need to install? If not, what do I do next? I seriously need some help.