I'm using typewriter function to simulate computer access and have a few issues that I can't get my head around.

Am I able to make multiple typewriter actions trigger after the last has ended instead of simultaneously?

Can I change colour mid typing like I can with message actions (eg {colour:Firebrick:text here. })

I don't think so. However, a few people have posted more sophisticated typewriter scripts that can do more when someone asked this in the past. It might be worth searching the forum for those.