Need advice on feral cats

[Yzma]

Getting them used to being indoors, even with no one around is a small step.

You can leave the radio on to get them used to voices etc.

You can also leave an old (or new) glove around and get them used to it. I used a glove to make friends with some feral kittens a while ago.

I think that just having them inside will be a good start.