Big thanks for all of your advice.
I think I will go on with the story if I have some spare time at the weekend.
Until then, I still have a little more time to figure out what to do.
But somehow, I think I'll go with Lexi for this playthrough. I don’t know, but at first I thought she would be a bit spoiled, but that is not really the case. It feels like she is pretty clever, quite humorous, and sadly also lonely. Somehow, this seems a bit like the story of the movie Notting Hill to me.
Nevertheless, so far every character seems to be so well made that I will definitely go for at least a second playthrough, or maybe even more.
PS: I didn’t click on the spoiler because I think the story is just too good to get spoiled. ^^
PS2: It seems like everyone has another opinion about what to do...