Your first draft is you talking to yourself. Editing is you talking to everyone else.

The first pass exists to get the thing out of your head, which means it is allowed to be messy, repetitive and out of order. Editing is a completely different job, done for a reader who has none of your context. Most people fail at writing because they try to do both at once and freeze. Separate them and both get easier.

Write the next essay or message fast and badly on purpose, without stopping to fix anything. Then go back as a stranger and cut whatever only made sense to you.