Howard -
Affinity Designer is a good inexpensive option. Fusion does not handle Text very well.
You can just copy the text and then paste it into Infinity using the Text tool. You do want to convert the text to an object as that is what you have to download to the Shaper Origin. Under the layer menu of Affinity is a "convert to curves" option. You want to have the font and size accurate before you do that as you then can no longer edit the text. I'd just duplicate the text before converting to curves and then you can easily delete the object and edit or change fonts to get it visually like you like it.
There's a lot of discussion on the Shaper forum about text, font choices, etc. I'd suggest you sign up there and read up. Definitely practice on scrap wood with various font options as all fonts are actually outlines - so Shaper will want to follow the outline around the outside of each letter. It's doable, but you'll want to practice first to get a clean cut.
There are also several discussions there on inlay / cutting boards and ways of filling with epoxy versus leaving it open.
It's a fun machine. Don't get frustrated. Just ask questions! And experiment!
neil