Help a Dumb Ass With His Tinyboard Problems

So I made my tinyboard chan. I'm not a programmer though and I'm really confused on this php stuff.

Whenever I make a change in the instance-config file, it shows up for me when I view it locally(like when it says .html at the end of the url), but not for people viewing it from other machines.

Also, I restarted my computer and I can't go anywhere on the site except for the home page. I tried to go to (chansite).org/mod.php, but I got a 403 forbidden error.

I have no idea what's going and I'm scared.

>>42
something about configurating his web-site, not an actual program question
I will probably astonish you, but most programming jobs are about configuring something correctly. For example as a PHP programmer you won't be writing much code, but setting up CMS and configuring Linux.