what do you do after you talk to rosalind because i have no clue please help me
Just leave the house with Rosalind - you'll get the new quest marker *(if you raided the book shop already)
when i try to ask for help she rejects me
You can go to the Merc Guild and snitch on her to progress the story. For her to help you needed to get the code from second safe in Rugald's mansion.
