Personally, my process after this is to express my thoughts in bullet points, followed by inserting any placeholders and captions for any graphics (e.g. charts or diagrams), and then finally I start rewriting my bullet points into proper sentences, expanding my examples, and adding any interstitial text necessary to make things flow.
Also, I see some comments on keeping things short and to the point. In general, I agree with this, but depending on the medium, sometimes it doesn’t hurt to inject a bit of personality into your writing. Technical writing can be dry at times, and this can deter engagement. Try to use concrete examples whenever possible or refer to other supporting texts.