Sperm donor looking for help advice

Good evening, I’m new to all this, I have been researching but I feel I am unable to go via traditional routes so I’m curious if it is possible or legal to donate in a private setting?

I’m healthy, fit, tall, articulate, 5th generation Australia and UK before that.

I come from a big family all my bros and sisters have multiple kids all healthy no issues no deaths but I’m yet to have any so I thought why not help those who need it?

I would be open to a co/parent but not a deal breaker; that is your choice I just want to share my seed to help those who may not afford to go the traditional routes?

Really looking for more advice and legality