Writing Docs in English for a Data English Speaker?

There's a, it's pretty common for folks with ADHD to be perfectionists. My first piece of advice is just get it out in whatever words. If you do not feel that your English is up to the task, talk to your manager. Tell them tell your manager that they can pay for an English tutor if they insist on you writing their documentation. Because you don't have the skills to do it.