How to Convert a PC into a Complete Hosting Server with all features as provided by company just to learn, not professionally

I have a PC having

Hard-Disk - 500GB
RAM - 4GB
Processor - Intel® Core™ i3-2330M CPU @ 2.20GHz × 4 
OS - Ubuntu

I want to demonstrate a complete hosting service on this pc, where i will provide user 5GB Space, cPanel, and all things..