I want to make a forum with a separate page where I can post links to news on, does mybb have any themes
MyBB has a
portal page (
eg.) that can be used. also you can use
page manager plugin to make pages as required.
Go to MyBB extend, you will find a lots of theme
https://community.mybb.com/mods.php
And as said my .m., you can use portal page.
And you can also use sidebar as suggested by metulblurr