There is a particular font that I want to use. I don't know what it's called, but I can scan in an example.
Is Ask Ubuntu the appropriate place to ask something like "Is this font available for Ubuntu, and if so, how do I install it?"
There are a few component questions here:
On balance, the first half is probably more one for a design SE site (honestly not sure where is best) or even just WhatTheFont for some self-help.
Then once you know what the font is available as, you could either look for questions about installing fonts or ask a new one about your particular font if it isn't a OTF or TTF font format.