There's a BLW group on here that you might find helpful. You tend to feed them the purées yourself, but give them a spoon to play with, my LG now tries to feed herself with the spoon, we have only been weaning for two weeks (we put the food on it, and she puts it in her mouth)
BLW means no purées but solid food (although I’m confused by your comment because you mention finger size slices?)
It’s ok to give some puréed food. You don’t have to go 100% BLW. Put some on the spoon for her, then hand her the spoon to feed herself
I did a mix of puree and blw with my first for a month. I would have 2 spoons and offer the spoon to him and he would hold it with me and put in his mouth. He’d then hold on a play / eat from it while I pre load the next one x
Baby led weaning I believe is more finger foods, not purées. Dependent on age Let her hold a spoon as well as you feed her.