Overwhelmed by bots

My sub r/seniorkitties is being overwhelmed by repost bots. Someone suggested I up the karma minimum. Yeah I made this sub and don't know how to do anything 😭 I've always just let other kids run the place that are better than me at figuring this stuff out. So now I turn to ChatGPT to ask how do I do this. It said go to mod tools and then to automoderator and I don't see it. I'm on the app on an android phone. People are upset with me, Im upset with me.