Pre-Requisites

1. Make sure you're using DNN 7.4.2 or higher, 9.2.x or higher preferred
2. Make sure you have a superuser login

Install 2sxc

1. Download the version from the releases on github how. 
   If you're a normal user, you will probably want to stick with most tested/stable LTS versions. If you need some of the latest features, use the latest stable version. 
2. Install the extension to install 2sxc
3. When done - await restart of DNN and you're all set. You can now continue with configuring your portal as you desire.