@Makuna_Hatata Hi there! I totally understand the struggle because when I first started writing a book I was 15 and I had no idea where to start and how to do it. And I always tended to be a perfectionist over this so I always kept writing something then deleting and changing etc.
The start may seem difficult but you will get there! Practice is the key. One key point I've learned during this journey is that it's best to plan your book ahead of time if you are sure you want to write a book. Additional scrambling is good too and helpful!
Personally with Frozen Hearts, when I first published the book on Wattpad it was back in 2019-2020. I knew what I wanted but I didn't know how to deliver. I found myself stuck in ideas and unsure of what I should write next until I took a break, got some tips and tricks about writing Fantasy book from Youtube and watched some free writing courses. I decided to start doing research brainstorm put my idea on the paper until they were slowly connected.
I hope this gave you an impulse to start writing :) Sharing experiences is beautiful because you may get tips and tricks about certain areas. And don't be afraid! Just go with the flow!