Here are the steps to get white blonde hair:
1. Manage your expectations. If white blonde hair is what you want, it’s important to understand what will go into the process.
2. Decide to DIY or visit a pro.
3. Change your hair care routine.
4. Introduce a hair mask into your weekly routine.
5. Take a break from heat styling.
6. Refresh your white blonde hair color.
Here's a more detailed step-by-step guide from L'Oréal Paris and another one from You Probably Need a Haircut . You can also check out this article on 15 Ravishing White Blonde Hairstyles for 2023 .
I hope this helps!