A good online job for a fast typer is data entry but you need to have a college degree in the data entry field in order to get hired online and work from home as a data entry specialist.
Some people working from home as a data entry specialist earn as much as $500.00 per day if they're very good at the job they do.
You could also look on freelancer or any other freelance websites to see if someone is needing someone to write good blog content as some people will pay you to write blog content for them but you need to be able to write stellar blog content.
If you can type fast and write lots of blog content for people then you could earn quite a bit of money doing that.
You could also begin your own blog and write blog content with information that is high paying in adsense keywords and overtime gain a lot of traffic and earn lots of passive income overtime from the blog content you posted years ago.