Hello old friend,
Where are you from originally? Is German your mother tongue?
You say that you're currently studying Biology in Austria, where did you decide to study and why did you decide to move to Austria?
I'm surprised that you deactivated all of your social media. You're probably the only student in the world to make that decision. Most students would embrace social media so that they can keep in touch with their college mates and all of their activities.
Could you temporarily reactivate your Facebook and let us have a look please? You don't need to reply to anybody else, just enough for us to check that you're not another AI generated fake account.