There are probably some old threads on this topic - but, I don't know if it has its own section.
If not, maybe we can start one.
Mostly, people need to figure out what their worst problems are and start repairing them one-by-one.
99% of the time, people are writing too fast.
Depending on your age - you might have several decades of muscle memory built up - but, it's not rocket science.
If you learned cursive, you already know the basic shapes.
Consistent Cursive is a good program (on YouTube) to lead you through the steps of repairing your cursive.
I'm always happy to give people tips if they want to post an example of their penmanship.
Maybe Lyric will post a before and after shot of her penmanship.
It would be a very good example of how much progress can be made in a fairly short amount of time.