Jojo,

Sounds like you got it covered, but don't be too afraid to skip. I started out in K at a normal age, but then jumped to 1st while in K then in 2d jumped to 4th. All I can recall is being very small compared to others, but after the first day, I settled in and enjoyed it.

Handwriting was my weak link on my grade skips. I also had to learn note taking as well once I went into HS classes. The only other issue was learning how to pronounce the big words I was reading.