Not a bad idea at all. The original premise behind my own Monday Rundown posts was to give myself a day to lay everything out for the week and post announcements, as well as hold myself to a schedule. Setting up specific requirements is highly effective at actually accomplishing your goals, and can build both momentum and confidence.

I would recommend you don't shy away from altering your general framework here as you move forward. You might find that once you get into a rhythm, you may have too many things you want to make posts about and not enough days in the week to post them. If that happens, maybe write them down locally and try to schedule them well ahead of time, so you can make it through future dry spells.