That is one of the pieces of advice shared here as well. https://www.youtube.com/watch?v=Zz70rcguxwk - Also, to make this easier, turn off any extensions you may have like Grammarly. I find that the constant suggestions of spelling errors, grammatical errors, or suggestions on how a sentence can be better structured, is super distracting.

It makes me slower,

Makes me second guess myself

Is not a form of positive reinforcement in the moment

Makes me lose track of what I wanted to say.

Once the first draft is done, by all means, use all the tools you have available to improve your writing (remember to learn from your mistakes), and fix spelling and grammatical errors.