I Need To Report My Father For Sa & Harassment. What To Expect?

Location: SC

The title. My father molested me (most recently) while I was in the hospital after a very bad car wreck when I was 25. That was 9 years ago. I never told anyone, as I had 3 shattered limbs so I couldn't deal with it. 3 years ago I had my son. Around the same time, it came out that when I was still a baby, he also touched my older cousin (about 12 at the time) who was there to watch me, & his family protected him. I went NC after that bc I couldn't allow my son to be exposed to that monster. It kind of fizzled off since he left us alone.

Recently, I've been struggling with severe depression after a miscarriage leaving to me seeking help at the ER & staying overnight. My father has been slowly showing up places since he found out. He started volunteering at the church food bank that I go to (& greatly depend on for my son). He came up to my car & tried to see my son, & he's shown up every week since so there's no time i can go when he's not there. He sent me a copy pasta on FB messenger from an account I didn't know about (his previous one is blocked). He came by my house (which is owned separately by my mother) & pulled in the driveway loop & stopped, then drove back out, a few times. He didn't say or do anything, but he has a huge dually 3500 truck that rattles the whole trailer & woke my kid up. It was definitely him bc the truck has very distinctive body damage. It just feels super threatening? Like he wants me to know he's watching us. Now that he's caught wind that I'm vulnerable. I need to put a stop to this.

So I'm going to the county sheriff's department tomorrow, to at least get a report & hopefully a restraining order. But I'm shaking down to my soul. I don't know what to expect. He's a decorated & respected firefighter & first responder. He's friends with the town police chief (that's why I think going to the county sheriff would be better, right?) & everyone thinks he's just a sweet old man. But he's a predator who preyed on & tortured his daughter & his niece. He put me in a mental hospital as a young child when he thought I'd talk, so he could use doctors to gaslight me, & later medicate me into submission. How do I make anyone hear that he's not who he seems?

So... my questions, I guess:

What can I expect? Will they take a report from 9 years ago, or will i be laughed out? Will they ask me questions, or tell me to write it down? Who do I ask for? Where do I start? Do I mention the childhood stuff? My memory of that is so hazy. It's buried under a medicated fog & willful suppression. But I remember every millisecond of the hospital in 2016. Will they arrest him? Do I need to ask for a restraining order? If I get one, can I use it to make him leave the food bank, even though he's a volunteer? (& if so, how?) Do I have to go to court? How can I make sure he doesn't retaliate via getting me kicked out of my house (since my mom inherited it & they're still legally married)? Do I need a lawyer (if so what kind)?

I know that's a lot. My head is swimming & my belly hurts. Please someone give me any guidance at all.

Thank you.