I feel this too, and the way I deal with it is writing targeting the audience that you can still remember being a part of, for whatever is interesting to you.
So think back to what you knew and thought 6-9 months ago, and write for people in that boat. You probably learned a nifty trick or two since then, or had a recent revelation. Write just about that. Once you have an audience you can start to listen to their reactions and further questions to decide how to back-propagate from there even more (because not everyone arrives at that point from the same path).
The cool thing is that this works even for stuff you aren't a master at -- there's always someone who is just a step or two behind you in whatever it is you are doing, even if you are only on step 4 or 5 from being an absolute beginner. As long as you care about the topic and can pinpoint a meaningful thesis for your writing.
So think back to what you knew and thought 6-9 months ago, and write for people in that boat. You probably learned a nifty trick or two since then, or had a recent revelation. Write just about that. Once you have an audience you can start to listen to their reactions and further questions to decide how to back-propagate from there even more (because not everyone arrives at that point from the same path).
The cool thing is that this works even for stuff you aren't a master at -- there's always someone who is just a step or two behind you in whatever it is you are doing, even if you are only on step 4 or 5 from being an absolute beginner. As long as you care about the topic and can pinpoint a meaningful thesis for your writing.