Since you are just getting started, I suggest you read through this long thread that has lots of tips for newbies and hopefully answers more questions than it generates. 
Beginner questions - Support - Xert Community Forum (xertonline.com)
There is a profile questionnaire on that thread. You are welcome to post your answers here as that will give us the framework to guide you the right directions (setup, goals, athlete type, etc.).
When you see posts in German you want to translate, highlight the text, then right-click and select Translate.
It does take some time to learn all the ins and outs of Xert, but you can do that as you ride indoors over the coming weeks and months. For example, listen to a podcast or watch an Academy lesson video during a low intensity endurance workout.
Welcome aboard.