Didn't help. Today I did manage to get past character creation after I changed my graphics settings to very low but it crashed shortly after that. Other attempts with very low settings failed during the usual times. Therefore I don't think the graphic settings (very low, low etc.) have an impact on this issue. Especially since it crashes while still being in menues. I guess I'll just wait for a few weeks and come back then. Maybe it's fixed then.
The crashdump file which is created when the game just crashes (not killing my rig) states the following:
"Der Thread hat versucht,von einer virtuellen Adresse, für die er nicht über die entsprechenden Zugriffsrechte verfügt, zu lesen oder in diese Adresse zu schreiben."
Which translates to something along the lines of:
"The thread tried to read from a virtual address without having the appropiate access rights or to write something into it."
I disabled texture streaming inside the graphicSettings.lsx file but the error still occured.