What's the right way to…

Hi people!
I need to apply some customizations to my bbPress forum.
First of all I need to remove the sidebar for the bbPress pages, what’s the right way to do this? maybe creating a conditional tag with “widget logic”, or assigning a custom page to the bbPress forum with a layout without the sidebar? Or editing some layout page into bbPress template?

Then I’d need to have the first page of the forum like here, with the latest topics, I found some ways to do this, but nothing appears to be the right way.

Thanks