Thank you all for your warm welcome!
Being 23 and driving a car like this is really a huge luxury and not ordinary! I feel quite lucky to be honest!
The starting-Issue only really appears when it is cold outside and the engine is cold aswell.
As soon as the engine is warm, starting is not an issue. It fires right up after like 2 cranks max.
But your tip with the extra ground strap is great! I will take this into consideration and maybe also get one for it. Thanks for the link to the other thread!
When it comes to the red lettering it seems that nearly everyone has this issue so i won't worry too much about it
I just uploaded a short YT-Video of the engine running in idle. Maybe you guys can hear what I mean, it's a rather sharp metallic clicking noise. Maybe you guys could just compare the Idle of mine to yours.
https://youtu.be/X-Gb0KPkQ0c