Hahaha I get that. So many tiktok videos and tutorials from people who have very mediocre writing.
My wife took up painting watercolor paints and decided she wanted to paint holiday cards for our friends and family but her handwriting is rough. She encouraged me to get into calligraphy so I could write the messages for her. I kept looking up individual letters and just practicing those but it made it hard to find a consistent style.
I found a YouTube channel called Loveleigh Loops who has beautiful handwriting and has videos about how to write all the holiday and common messages like happy birthday in multiple styles. She has a few tutorial videos as well which has helped me understand the basics, such writing wider gaps for loops like e and l and making thicker lines in downstrokes.
That said, I swapped to a brush pen because it's easier to get the hang of in the beginning while I practice with calligraphy pens. I'm still struggling with controlling the line thickness: angling the pen is much harder than just pressing down lol. I also have a hard time making full contact with the nib and putting even pressure along it.