Rare, and the numbers work against you.
1 in 150 and mostly male,
1 in 500 female?
Times fifty years,
1 in 25,000, female, 15,
Murray Bridge, 18,194,
female and within 13 to 18, there should be four in your town.
Then come the problem that it is rural farm country, country kids spend time alone, I did.
Girl gamer might be rarer,
and artist.
This planet is about large enough for one RedMage.
What I have learned from WP is a specturm of AS, times a mix of age, gender, other conditions, times a range of personalities, means we are all alone.
A simple DNA test points out one in 8,700,000, about the same odds as winning the six number lottery.
One more marker we are up to total planet population.
The One and Only RedMage!
I am happy to find one small thing in another person I can relate to.
If anything, AS works against you. Your natural group would be girl gamers,
They all have this thing for computers, and are focused on play.
What you have to work with is fan art, you have mentioned conventions.
Not going to happen in Murray Bridge.
There should be a fairly large group, about your age, in Australia.
Go with art, AS is impossible to explain, art is a close second, but acceptable.
There is original video game and anime art, but that is hard to hang on a wall.
I like your Red Mage drawing. I think there will be a secondary market.
Anime and game type images as posters? I can see it used in advertising.
It is an up and coming field, you have the knowledge base, you know games.
Your computer graphic art skills are developing.
Being an obsessive aspie can work for you,
it took thousands of hours just to get the background you have.
It will take thousands more to develop a drawing style, and learn the software used.
I lived in New York City, knew many artists, they all wanted to move upstate to some dead farming town where they could focus on their work. You are there.
Most artists are seeking a patron, someone to support them while they develop, you have it.
You know the history of the field,
You have the drive and time to develop it,
in two years you could have a body of work that would get you into a University, a job, or a business of your own.
Teens spend a huge amount of money. ads pitched to them, images they will respond to, are big business.
Behold the Power of RedMage!