RSS Feed plugins - Global Recent Posts

Hello,

I'm relatively new to WPMU having purchased it in Nov, 2014 ... and used it very little since I found the plugins to be giant maze.

Currently, I'm looking for an RSS feed to my website in lieu of using the Multi-RSS-Importer or RSS Aggregator plugins. And while you offer the Global Recent feed plugin ... and while I downloaded it an got it installed, I'm getting a message that I need 4-5 other plugins to make it work ... plus something called multisite is required.

Probably cool stuff .. but right now looking to just keep it simple ... and hopefully get some use the $100 I paid you guys for the WPMU membership. The instruction manual indicated to download post indexer ... which I did - beyond that, looks like I'm stuck

Thanks,