When i trying to get a kitty to trust me i put food down for it, and then i sit down an appropriate distance away. I stay seated while the kitty eats. Talk to it a little, but if its really scared just sit in silence ignoring it. It gets used to you being there. Every time move the food closer.

I used to work at a private golf club as a cart girl. When the course was empty I'd go sit under the stairs with a family of feral cats that lived in the bushes. I could never get the mom to let me pet her, but i rescued 2 litters of kittens. I kinda miss that job Lol