Not only are your anxieties understandable, they're normal. Every year in the weeks preceding the start of school I'd experience anxiety and when commenting to colleagues during pre-sessions, they were going through the same thing. This happened all of the 12 years I taught. (I think it was 12. ECT makes it difficult to recall with certainty.) Anyhow, although I did not teach kinder, my heart is still in the classroom and would be happy to support you via PM as the year goes on.
You can do this. Just be especially conscientious and deliberate and everything will fall into place.
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