Hello,
We are glad to have you here!

It sounds like you are off to a good start with your kiddos and are enjoying school. It can take some fine-tuning when first placing your kiddos in HOD. In thinking about your options, the jump from Bigger Hearts to CTC is really large skill-wise and independence-wise too. It would be better for your daughter to have Preparing Hearts in between.
When kiddos are coming to HOD from a school setting it can take time to find the right guide placement - as it takes a bit to see what each child can truly do. Some kiddos can really take off and need a new look at placement. That sounds like what has happened with your daughter.
Based on what you've shared thus far, I would lean toward having her begin Preparing Hearts after your next scheduled break. Taking into account her age, her skills, her move toward independence, along with her spelling/reading/math/English skills, it looks like she would be well-placed in Preparing Hearts.

I would continue having her do her cursive workbook each day from Bigger Hearts to learn cursive handwriting. Just do a page a day until she is done.
Depending on what level of Rod and Staff she is doing, she may or may not need a change there. We can gladly help you talk through that too.

What level of Rod and Staff English are you using with your daughter?
As far as dictation goes, you may have a natural speller, so she may not be one to miss many passages even when you go up a guide. Don't get too worried about over-challenging her as far as dictation goes. I had one child who never missed a passage for years. It didn't hurt him at all to do all of the dictation levels. He is a terrific speller and still enjoys writing to this day.

Dictation was just one of his "easy" subjects, and everyone needs some of those!
If you get a chance, feel free to pop back and share your thoughts!

The good news is you'll be able to use Bigger Hearts with your son in the not too distant future!
Blessings,
Carrie