Welcome to the community!
Carbide Create should pick up fonts that are installed on your computer, so anytime you are missing one and there is a way to get that font somewhere, just install it (are you using Windows or MacOS?), restart CC and it should appear in the list.
Here’s a short tutorial for adding custom tools in Carbide Create:
Square one is the series of video tutorials (just in case you did not find them yet):
https://docs.carbide3d.com/assembly/carbidecreate/video-tutorials/
Then, don’t hesitate to ask any and all questions here, there are lots of nice folks ready to help you.
You can also contact support@carbide3d.com if you are having specific difficulties with a design.