Keep taking a look at myanonymouse. They open up registrations regularly. This place will have what you’re looking for along with a great community.
Could you give us some insight into how much bandwidth up/down your instance is using? Thanks for posting your server specs. I’m tempted to self host an instance when I finally get a gigabit connection in the next few months.
It’s a piece of piss and I’m not exaggerating. Just make sure you read the rules etc.