Hi @Kathy Andersen!
Those fonts are very similar to those used by Mary Valentino @Emma’s Sweets (for some reasons I can’t tag her on Cookie Connection from my Iphone).
She posts video while she is piping lettering by using a projector all the time on her Instagram feed. She uses tipless bags and she says that “consistency is the key”.
This is the link to her tutorial on her YouTube channel, where she shows the icing consistency.
This is a link to a video she posted on her Instagram where you can see better how she gives the thin and thick look to each letters (definetly it is all about icing consistency and a lot of practice and she has mastered this technique for sure!).
That said, there are copyrights on fonts and their terms and conditions change very often.
Infact at a certain point I paid the fee required to use my watermark font as terms and conditions had changed, and it wasn’t free anymore. I also got in contact to the author to make sure I could use her font to make cookies, as I often make cookies handcutting the letters that make up my name in that font. So my advice is to make sure to check the licensing requirements of the font you use.
I hope this helped you