if you only need a few words, search "Letter and numbers" there may be some out there.. Then print what you need and glue them on.. Learning the CAD software is definitely a requirement if you want to really do what you want to do. I went with onshape, but probably should have chosen fusion 365 as it seem to be more popular and in so you can find answers to more "How the heck do I do that" questions as you learn.
Good luck!