Hello, I do not know what I'm doing wrong.

My N5 had Ubuntu Touch on it and I wanted to make as the only system now Sailfish OS and version 3.3.x.x on it.
Points 1 -2 were already done (Ubuntu was running).
Do I also need point 3 and if so how ? (At the moment there is no system on the N5.
TWRP 2015 is installed because I only want to have Sailfish.
Point 4 is done and point 5 I do not want.
Point 6 Without error message also done, but now my N5 is stuck in the bootlogo.

what am I doing wrong ?

Thanks for your help

Greetings
Steffen

PS: all refers to post number 1169