I have to stop before planning posts for Little Comet Crafts. You said the channel is "set as made for kids". YouTube's help page says "Posts aren’t available if" a channel is set as made for kids or the account is supervised. So a posts calendar would plan content the channel cannot publish, and I will not draft one.
What I can't tell you: whether the made for kids setting is right for your channel, or how to change it. That is not covered in my sources, and the setting is your call based on who your videos are for.
If the setting is different from what you wrote, please confirm it, then send these required items in one message: 1. channel_status: made for kids yes or no, and supervised yes or no. This decides whether posts are possible at all. 2. uploads: the video titles and publish dates for the period. A post that shares a new video goes on its publish day or later, so I need the real dates. 3. post_facts: what posts may say, such as behind the scenes facts, questions to ask your audience and links. I draft only from these and will not invent ideas or details. 4. start_date: the first day of the calendar. "This month" does not give me a date to number the four weeks from.
Optional, default I will use: - posts_per_week: default 2.
Nothing would be scheduled or published without your approval.