Anytime your brother physically attacks you, you have a right to file a police report. Your parents cannot stop you, unless you choose to do so to appease them. I take it that you made that choice.

If you make a report and the police do nothing, at least there is a report. If you ended up making report after report, they would have to pay some attention to it.

Never forgive any adult male for physically abusing you, unless that person makes a very contrite apology, which is unlikely to happen. Forgiveness for anything is only appropriate after the person demonstrates contrition. So I don't see where you should be forgiving your brother.

It does sound like you need to get out of that home. That can be hard to do at your age nowadays. Once you get employed, maybe you could find some other young women to share an apartment or house with. Then you would want to be sure not to have your brother on the premises of where you decide to live. This doesn't sound like something that you and your brother are ever going to patch up. Just avoid him as best you can. I doubt he particularly cares what you think of him.

Your parents are living in some kind of La La land. You probably can't do much to change that either. Sounds like a very toxic home. Hope you find a way out of there.