Answer: It doesn't. Practice makes perfect. All you need to do is practice.
Ways to get better:
1. If you want to get better at cursive, trace cursive letters and try doing it on your own.
2. Make sure you are use a writing utensil you are comfortable with
3. Find your own way of doing it. It is ok to tweak a few letters to make it easier and neater
4. Find the right font of cursive
5. Watch videos to help!