Some Help for a Newbie.

[Netherlord]

New to IPS 4 and just need some help on doing a few things.

How to change Rounded Avatars to a Square (Done. Found option)

Adding a members list page? thought this would already exist but i cant see it so how would i make this.

And Setting One of my forum categories as the site homepage?

And basic instructions on changing language? do i do that from the ACP.