Raspberry Pi stuck in Preparing Home Assistant

Hello.
I’m a total novice when it comes to Home Assistant and just want to get started.
I want Home Assistant on my Raspberry Pi 3B
Let run.
However, the “Preparing Home Assistant” never finishes.
I have already loaded the image onto the SD with different programs and used different SD’s and tried other routers and internet providers but it just doesn’t work…
Can someone help me?

The installations needs to download and compile a lot from GitHub.com, so make sure the Internet connection is working and have a lot of patience. A RPi3 is not fast at all and it might take several hours to compile and GitHub can also have issues that extend that time with hours or maybe even a few days.