You did fine, as a new user I am surprised that you even attempted to get to the console and so on.
With forcefully powering off, the biggest (or I guess most likely) thing that could happen is losing data. As long as your install wasn't working on updates or major system configuration changes, you'll probably be fine in that regard; it would boot back up just fine.
Check your keyboard layout. Perhaps add whatever language keyboard you are looking to use the characters from? In my case, I couldn't find a Welsh keyboard but the UK English keyboard has keystrokes for characters like ŵ. That could potentially be an option.
All I do is crunch numbers and eat wood glue. No pizza.