i need help for quickstart I am beginner level

Hi i am beginner level in all these joumle, i bought one template but i dont know how to use quicstart for this. I connected on chat but their reference page want including detailed information. I am a bit confused. I dont know how to use Xampp and how to connect with my databese or my page. I also have important data in databases which are created chronoforms and chronoconnectivity i dont want to loose these information. This a webpage for a charity in educational bases in Colombia. Please can you help me for this. Thanks