What works for me might not work for you. I make no guarantees that anything you’ve read here will help you, but I’m pretty hopeful that it will. The biggest pieces of advice beyond this I can give is as follows:
1. Write. Every day. Write. Always write, even when you don’t want to. Just write something.
2. See #1
3. Practice every aspect of writing. Writing is more than just putting words on a screen or paper. Using your imagination to build ideas, worlds, scenes, etc. is essential. Your imagination is as important as your writing skills.
4. Find what works for you and make it into a habit. Good habits will help you practice which will in turn strengthen your writing muscle 😉