Wanting to start weaning a nursing OBSESSED toddler. No idea how.

My daughter is 2 years old as of a couple months ago, and I have been nursing on demand her entire life. She is absolutely obsessed with "titty" and is practically attatched to me most of the day. I have so many doubts and worries about weaning, primarily involving how will she nap/sleep. If I could give up all nursing EXCEPT nursing to sleep, I would, but I don't think my daughter would do well with sometimes having access to it and other times not.

I don't know whether I should try to wean gradually, have a strict cutoff date that I work towards, go cold turkey, or what would work best. Nursing is such a source of comfort for my daughter and I know it sounds silly but I feel bad taking that from her. I currently can't even imagine her life NOT revolving around my boobs, but I am ready to have that reality... somehow.