If this is the group with your GoDaddy hosting (or another one with web hosting), it may also be worth checking what your package offers.

A quick look at this GoDaddy page shows their Linux hosting packages come with the popular phpbb. I think going about it that way ought to take away installation and update concerns as I assume they do the maintenance.

My web hosting package (with a different company) does have softalacious in its cPanel. That supports a number of forums. That should make installation easy although I'm not clear at the moment how you proceed when you need security updates.