What I did: (1) start a blog, (2) force yourself to write at a specific frequency at all costs, like once a month, (3) plan and schedule future writing topics and times, (4) be very intentional with each sentence and paragraph, and (5) start with an outline for each post and iterate on it before filling in with details.
#5 feels like a superpower to me. It has made writing so much easier. It forces me to really understand (and to realize what I don’t understand) about the topic.