So, I installed Xoops. But I don't understand how to get forums. What should I do?

Welcome.

You have installed XOOPS version 2.0.14 or 2.0.15? They no longer come with core modules. So...you need to go and get the modules you want and download and install them. The XOOPS release notes has links to places to get modules. Quote:

You can also go to the FAQ section on modules and on page 2 there is a question - where are the modules for XOOPS 2.0.14 - there are more links there.

Being new to XOOPS you need to access the following:
New users should always checkout the following:
1. Documentation - linked on the left. Specifically the administration manual
2. The FAQ section - linked on the left - specifically the sections on gloassry, beginners first steps, modules, blocks and themes. There are links to visual tutorials here.
3. The search function on the top right.
Please check also the read B4U post link below if you have problems.

For Visual tutorials please go here

HTH

Great. But where do I get the Forums Module?

Use the search bar - upper right and search for 'forum module' or CBB, or browse the module repository. Or use the link to the release notes and take the links to the module providers given.

EDIT: Vis the repository links - did you see this in the post above: * XForge site (CBB forum, Wordpress, MediaWiki...)

CBB forum is our most common forum module.

Nice, thank you and sorry for the waste of time, I think I am set to go, again, thank you. ^^

Not a waste of time - happy to help [size=x-small](Just prefer to give you the tools rather than do it for you )[/size]